Gaya APA

Magdoff, F., Es, H, V. (2021). Building Soils for Better Crops: Ecological Management for Healthy Soils (4). Maryland: Sustainable Agriculture Research and Education (SARE).

Gaya MLA

Magdoff, Fred., Es, Harold, Van. "Building Soils for Better Crops: Ecological Management for Healthy Soils". 4 Maryland: Sustainable Agriculture Research and Education (SARE), 2021. Elektronik/Digital.