Philippines, & Bureau of Agricultural Research. (1990). On-farm research manual: Planning on-farm research. Quezon City, Philippines: Bureau of Agricultural research.
Trích dẫn kiểu ChicagoPhilippines, và Bureau of Agricultural Research. On-farm Research Manual: Planning On-farm Research. Quezon City, Philippines: Bureau of Agricultural research, 1990.
ציטוט MLAPhilippines, và Bureau of Agricultural Research. On-farm Research Manual: Planning On-farm Research. Quezon City, Philippines: Bureau of Agricultural research, 1990.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.