APA استشهاد

National Fertilizer Development Center. (1973). Fertilizer trends. Washington, D.C: National Fertilizer Development Center.

استشهاد بنمط شيكاغو

National Fertilizer Development Center. Fertilizer Trends. Washington, D.C: National Fertilizer Development Center, 1973.

MLA استشهاد

National Fertilizer Development Center. Fertilizer Trends. Washington, D.C: National Fertilizer Development Center, 1973.

تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.