(1990). On-farm research manual. Quezon city, Philippines: Department of Agriculture, Bureau of Agricultural Research.
استشهاد بنمط شيكاغوOn-farm Research Manual. Quezon city, Philippines: Department of Agriculture, Bureau of Agricultural Research, 1990.
MLA استشهادOn-farm Research Manual. Quezon city, Philippines: Department of Agriculture, Bureau of Agricultural Research, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.