Cita APA (7th ed.)

Santos, G. (1977). Alkaloids of Phaeanthus ebracteolatus (Presl. Merrill.) isolation of several salts of Phaeantharine, a new quaternary alkaloid [microform]. Photoduplication Service. University of the Philippines Library.

Cita Chicago (17th ed.)

Santos, Gertrudes. Alkaloids of Phaeanthus Ebracteolatus (Presl. Merrill.) Isolation of Several Salts of Phaeantharine, a New Quaternary Alkaloid [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.

Cita MLA (9th ed.)

Santos, Gertrudes. Alkaloids of Phaeanthus Ebracteolatus (Presl. Merrill.) Isolation of Several Salts of Phaeantharine, a New Quaternary Alkaloid [microform]. Photoduplication Service. University of the Philippines Library, 1977.