APA (7e ed.) Bronvermelding

Não informado. (1958). Crops and soils. American Society of Agronomy.

Chicago (17e ed.) Bronvermelding

Não informado. Crops and Soils. Madison, Wis: American Society of Agronomy, 1958.

MLA (8e ed.) Bronvermelding

Não informado. Crops and Soils. American Society of Agronomy, 1958.

Let op: Deze citaties zijn niet altijd 100% accuraat.