Abubakar, N. M. (1974). The segmental phonemes of Tausug and English: A contrastive study [microform]. Photoduplication Service, University of the Philippines Library.
Chicago-referens (17:e uppl.)Abubakar, Norma Mercado. The Segmental Phonemes of Tausug and English: A Contrastive Study [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1974.
MLA-referens (9:e uppl.)Abubakar, Norma Mercado. The Segmental Phonemes of Tausug and English: A Contrastive Study [microform]. Photoduplication Service, University of the Philippines Library, 1974.
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