This list is a work in progress (first compiled by Aaron Lee, now updated by Dominic Yu and Holman Tse). Please let me know if there are good sources to add.
Cheng, Teresa M. (1973). The phonology of Taishanese. Journal of Chinese Linguistics 1.2:256-322.
Don, Alexander. (1882). The Llin-nen Variation of Cantonese. China Review 11:236-247.
DONG, LORRAINE, & MARLON K. HOM. 1980. Chinatown Chinese: The San Francisco Dialect. Amerasia 7.1–29.
DLI course (seven volumes). ERIC reference
Eng, Nancy. 1995. Lexical Tone in Non-Fluent Chinese-Speaking Aphasics. PhD Dissertation, City University New York. http://www.asha.ucf.edu/eng.html
Eng, Nancy, L. K. Obler, K. S. Harris and A. S. Abramson. 1996. Tone Perception Deficits in Chinese-Speaking Broca’s Aphasics. Aphasiology 10,6: 649–656.
Huang(?). another dictionary. (reviewed by Bauer. copy in texas.)
Lee, Gina. 1987. A Study of Toishan F0. Ohio State University Working Papers in Linguistics 36: 16–30.
Leung, Genevieve. 2012. Hoisan-wa reclaimed: Chinese American language maintenance and language ideology in historical and contemporary sociolinguistic perspective. PhD Dissertation, University of Pennsylvania.
Light, Timothy. 1986. Toishan Affixal Aspects. John McCoy and Timothy Light (eds.), Contributions to Sino-Tibetan Studies. Leiden: Brill, 415-25.
Maddieson, Ian and Karen Emmorey. 1984. Is There a Valid Distinction between Voiceless Lateral Approximants and Fricatives? Phonetica 41,4: 181–190.
McCoy, William J. (1966). Szeyap Data for a First Approximation of Proto-Cantonese. Ph.D. Dissertation, Cornell University.
Tsang, Chui-Lim, 1984, Sociolinguistic Considerations in Selecting the language of instruction in a bilingual programme, in New Papers on Chinese Language Use, Beverly Hong (ed) Australian National University: Canberra.
Tsuji, Nobuhisa. (1980). Comparative Phonology of Guangxi Yue Dialects. Tokyo: Kazama Shobo Publishing Co. [The Toisanese information here is taken from McCoy, above. -AJL]
Yiu, T'ung. (1946). The T'ai-Shan Dialect. Ph.D. Dissertation, Princeton.
Yue Hashimoto, Oi-Kan. (1972). Studies in Yue dialects 1: Phonology of Cantonese. Cambridge University Press. [Information about dialects in the beginning. -DY]
Yue, Anne. 2005. The Dancun Dialect of Taishan. Information Sciences Research Centre, City University of Hong Kong, 392pp.
Chao, Yuen Ren. (1951). Taishan Yuliao (台山語料, Materials on Toisanese). BIHP, Academia Sinica 23:25-76. [Well-known, but not very accurate. -AJL]
Chen, X.-W. 1966. Taishan Fang-yen Te-shu Bian-diao Chu-tan. Zhongguo Yu-wen 1: 34–36.
Deng, Jun 邓钧. 2000. Kaiping Fangyan 开平方言. 湖南电子音像出版社. [Perhaps the best description I've found.]
_____. 2003. Kaiping Fang Yin Zidian 开平方音字典.
_____. (Year?). Taishan dictionary. [Looks exactly the same as the Kaiping dictionary, but in orange. -DY]
Huang, Jianyun (ed.), Ye, Guoquan. (1990). Taishan Fangyan, Guangzhouhua, Putonghua Duizhao (台山方言、廣州話、普通話對照, A Comparison of Toisanese, Cantonese and Mandarin). Guangzhou: Zhongshan Daxue Chubanshe.
Zhan, Bohui & Cheung, Yat-Shing, eds. (1990). Zhujiang Sanjiaozhou Fangyan Zongshu (珠江三角洲方言綜述, A survey of Dialects in the Pearl River Delta). Hong Kong: New Century Publishing House.
Figueroa Arencibia, Jesus. (2008). Approximación al estudio español chino hablado en Cuba [An Approach to the Study of Cuban Chinese Spanish]. Revista Internacional de Linguistica Iberoamericana 6(11). 185-204.
Four Counties Blog - by Aaron Lee
"Hoisanese Sanctuary" - contains a very short wordlist