APA-referens (7:e uppl.)

Bautista, O. K. (1977). The effects of N, K, and CA on the growth yield and quality fo snap cowpea [microform]. Photoduplication Service, University of the Philippines Library.

Chicago-referens (17:e uppl.)

Bautista, Ofelia Karganilla. The Effects of N, K, and CA on the Growth Yield and Quality Fo Snap Cowpea [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.

MLA-referens (9:e uppl.)

Bautista, Ofelia Karganilla. The Effects of N, K, and CA on the Growth Yield and Quality Fo Snap Cowpea [microform]. Photoduplication Service, University of the Philippines Library, 1977.