Cita APA (7th ed.)

Aragon, M. L. (1980). Nitrogen-potassium ratios in relation to nutrient content and yield of cotton [microform]. Photoduplication Service, University of the Philippines Library.

Cita Chicago (17th ed.)

Aragon, Miguel L. Nitrogen-potassium Ratios in Relation to Nutrient Content and Yield of Cotton [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1980.

Cita MLA (9th ed.)

Aragon, Miguel L. Nitrogen-potassium Ratios in Relation to Nutrient Content and Yield of Cotton [microform]. Photoduplication Service, University of the Philippines Library, 1980.