APA ציטוט

Philippines, & Bureau of Agricultural Research. (1990). On-farm research manual: Cropping systems research. Quezon city, Philippines: Bureau of agricultural research.

Trích dẫn kiểu Chicago

Philippines, và Bureau of Agricultural Research. On-farm Research Manual: Cropping Systems Research. Quezon city, Philippines: Bureau of agricultural research, 1990.

ציטוט MLA

Philippines, và Bureau of Agricultural Research. On-farm Research Manual: Cropping Systems Research. Quezon city, Philippines: Bureau of agricultural research, 1990.