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Bibliographie
(en) Shigeki Kaji, A Haya vocabulary, Tokyo, Institute for the Study of Languages and Cultures of Asia and Africa, Tokyo University of Foreign Studies, , 532p. (ISBN4-87297-772-6)
(hay + sw + en) Henry R. T. Muzale, Ikaningambo ya Oruhaya = Kamusi ya Kihaya-Kiingereza-Kiswahili na Kiingereza-Kihaya-Kiswahili = Ruhaya-English-Swahili & English-Ruhaya-Swahili dictionary, Dar-es-Salaam, Languages of Tanzania LOT Project, University of Dar es Salaam, coll.«LOT publications / Lexicon series» (no5), , xlviii+375 (ISBN978-9987-691-05-0 et 9987-691-05-6)
(sw + en) Henry R. T. Muzale, Kamusi ya Majina na Matumizi ya Mimea kwa Kihaya = A dictionary of plant names and functions in Haya: ikiwa na Faharasa za Kiswahili na Kiingereza, Dar-es-Salaam, Languages of Tanzania LOT Project, University of Dar es Salaam, coll.«LOT publications / Lexicon series» (no18), (ISBN978-9987-691-28-9 et 9987691285)
(hay + sw + en) Henry R. T. Muzale, Ikaningambo y'Oruhaya omu Rungereza n'Orushwahili = Haya-English-Swahili dictionary with English and Swahili glosses = Kamusi ya Kihaya-Kiingereza-Kiswahili ikiwa na faharasa za Kiingereza na Kiswahili, Dar-es-Salaam, Languages of Tanzania LOT Project, University of Dar es Salaam, coll.«LOT publications / Lexicon series» (no24), , préface+1006 (ISBN978-9987-691-38-8 et 9987691382)