Polenda, F. C., & Elkins, R. E. (1989). A voice from the hills: Essays on the culture and world view of the Western Bukidnon Manobo people. Linguistic Society of the Philippines.
Chicago-viite (17. p.)Polenda, Francisco Col-om, ja Richard E. Elkins. A Voice from the Hills: Essays on the Culture and World View of the Western Bukidnon Manobo People. Manila: Linguistic Society of the Philippines, 1989.
MLA-viite (9. p.)Polenda, Francisco Col-om, ja Richard E. Elkins. A Voice from the Hills: Essays on the Culture and World View of the Western Bukidnon Manobo People. Linguistic Society of the Philippines, 1989.
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