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