Chu, E. C. (1977). High yielding rice varieties at the crossroads: Three post-trial alternative decisions among farmers [microform]. Photoduplication Service, University of the Philippines Library.
Cita Chicago (17th ed.)Chu, Eddie C. High Yielding Rice Varieties at the Crossroads: Three Post-trial Alternative Decisions Among Farmers [microform]. Quezon City: Photoduplication Service, University of the Philippines Library, 1977.
Cita MLA (9th ed.)Chu, Eddie C. High Yielding Rice Varieties at the Crossroads: Three Post-trial Alternative Decisions Among Farmers [microform]. Photoduplication Service, University of the Philippines Library, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.