Cita APA

Philippines, & Bureau of Agricultural Research. (1991). On-farm research manual: The farming systems approach. Quezon City, Philippines: Bureau of agricultural research.

Citación estilo Chicago

Philippines, y Bureau of Agricultural Research. On-farm Research Manual: The Farming Systems Approach. Quezon City, Philippines: Bureau of agricultural research, 1991.

Cita MLA

Philippines, y Bureau of Agricultural Research. On-farm Research Manual: The Farming Systems Approach. Quezon City, Philippines: Bureau of agricultural research, 1991.