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Heine, Bernd; Honken, Henry (2010). “The Kxʼa Family: A New Khoisan Genealogy”(PDF). 《Journal of Asian and African Studies》 (Tokyo, Japan) (79): 5–36. August 31, 2017에 원본 문서(PDF)에서 보존된 문서.
Heine, Bernd; Honken, Henry (2010). “The Kxʼa Family: A New Khoisan Genealogy”(PDF). 《Journal of Asian and African Studies》 (Tokyo, Japan) (79): 5–36. August 31, 2017에 원본 문서(PDF)에서 보존된 문서.
worldcat.org
Doke, Clement Martyn (Jul 1926). 《The Phonetics of the Zulu Language》. 《Bantu Studies》 2 (Johannesburg, South Africa: University of the Witwatersrand Press). ISSN0256-1751.