Maho, Jouni & Bonny Sands. 2002. The languages of Tanzania: a bibliography. (Orientalia et africana gothoburgensia, no 17.) Göteborg: Acta Universitatis Gothoburgensis. Pp ix, 428. ISBN 91-7346-454-6
This bibliography mentions other references like:
Betbeder, Paul; Jones, John. 1949. A handbook of the Haya language. Bukoba (Tanganyika): White Fathers Printing Press.
Byarushengo, Ernest Rugwa; Duranti, Alessandro; Hyman, Larry M[ichael]. (Eds.) 1977. Haya grammatical structure: phonology, grammar, discourse. (Southern California occasional papers in linguistics (SCOPIL), no 6.) Los Angeles: Department of Linguistics, University of Southern California. Pp 213.
Herrmann, [Kapitän] C. 1904. Lusíba, die Sprache der Länder Kisíba, Bugábu, Kjamtwára, Kjánja und Ihángiro. Mitteilungen des Seminars für orientalische Sprachen, 7 (III. Abt.), pp. 150–200.
Kaji, Shigeki. (Ed.) 1998. Haya. (Textbooks for language training.) Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA), Tokyo University of Foreign Studies.
Kaji, Shigeki. 2000. Haya vocabulary. (Asian and African lexicon series, no 37.) Tokyo: Institute for the Study of Languages and Cultures of Asia and Africa (ILCAA), Tokyo University of Foreign Studies. Pp 532. [ISBN 4-87297-772-6]
Kuijpers, Em. 1922. Grammaire de la langue haya. Boxtel (Hollande): Prokuur van de Witte Paters. Pp 294.
Rehse, Hermann. 1912/13. Die Sprache der Baziba in Deutsch-Ostafrika. Zeitschrift für Kolonialsprachen, 3, pp. 1–33, 81-123, 201-229.