Aragon, M. L. (1980). Nitrogen-potassium ratios in relation to nutrient content and yield of cotton [microform]. Photoduplication Service, University of the Philippines Library.
Цитирование в стиле Чикаго (17-е изд.)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.
Цитирование MLA (9-е изд.)Aragon, Miguel L. Nitrogen-potassium Ratios in Relation to Nutrient Content and Yield of Cotton [microform]. Photoduplication Service, University of the Philippines Library, 1980.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.