Philippines, & Bureau of Agricultural Research. (1990). On-farm research manual: Cropping systems research. Quezon city, Philippines: Bureau of agricultural research.
शिकागो स्टाइल उद्धरणPhilippines, और Bureau of Agricultural Research. On-farm Research Manual: Cropping Systems Research. Quezon city, Philippines: Bureau of agricultural research, 1990.
एमएलए उद्धरणPhilippines, और Bureau of Agricultural Research. On-farm Research Manual: Cropping Systems Research. Quezon city, Philippines: Bureau of agricultural research, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.