Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.