APA استشهاد

(1987). Soil fertility and organic matter as critial components of production systems. Madison, USA: Soil Science Society of America, Inc.

استشهاد بنمط شيكاغو

Soil Fertility and Organic Matter As Critial Components of Production Systems. Madison, USA: Soil Science Society of America, Inc, 1987.

MLA استشهاد

Soil Fertility and Organic Matter As Critial Components of Production Systems. Madison, USA: Soil Science Society of America, Inc, 1987.

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