Cita APA (7th ed.)

Africa, H. d. R. (1977). Chemical investigation of allamanda cathartica cv. 'double yellow bell' [microform]. Photoduplication Service. University of the Philippines Library.

Cita Chicago (17th ed.)

Africa, Helena del Rio. Chemical Investigation of Allamanda Cathartica Cv. 'Double Yellow Bell' [microform]. Quezon city: Photoduplication Service. University of the Philippines Library, 1977.

Cita MLA (9th ed.)

Africa, Helena del Rio. Chemical Investigation of Allamanda Cathartica Cv. 'Double Yellow Bell' [microform]. Photoduplication Service. University of the Philippines Library, 1977.