Hombrebueno, E. M. (1977). The influence of nitrogen-potassium ration and moisture regime on juice quality and NPK composition of Phil 56226 [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-referens (17:e uppl.)Hombrebueno, Eduardo M. The Influence of Nitrogen-potassium Ration and Moisture Regime on Juice Quality and NPK Composition of Phil 56226 [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
MLA-referens (9:e uppl.)Hombrebueno, Eduardo M. The Influence of Nitrogen-potassium Ration and Moisture Regime on Juice Quality and NPK Composition of Phil 56226 [microform]. Photoduplication Service. University of the Philippines Library, 1977.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.