Orejana, F. M. (1977). Voacamine and vobtusine from voacanga megacarpa merrill [microform]. Photoduplication Service. University of the Philippines Library.
Παραπομπή σε μορφή Chicago (17η εκδ.)Orejana, Florian Magno. Voacamine and Vobtusine from Voacanga Megacarpa Merrill [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Παραπομπή σε μορφή MLA (9th εκδ.)Orejana, Florian Magno. Voacamine and Vobtusine from Voacanga Megacarpa Merrill [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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