Covar, P. R. The Masagana/Margate system of planting rice: A study of an agricultural innovation. Community Development Research Council, University of the Philippines.
Chicago-referens (17:e uppl.)Covar, Prospero R. The Masagana/Margate System of Planting Rice: A Study of an Agricultural Innovation. [Quezon City]: Community Development Research Council, University of the Philippines.
MLA-referens (9:e uppl.)Covar, Prospero R. The Masagana/Margate System of Planting Rice: A Study of an Agricultural Innovation. Community Development Research Council, University of the Philippines.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.