APA (7e ed.) Bronvermelding

Não informado. (1981). Soil and tillage research. Elsevier Scientific.

Chicago (17e ed.) Bronvermelding

Não informado. Soil and Tillage Research. Amsterdam: Elsevier Scientific, 1981.

MLA (8e ed.) Bronvermelding

Não informado. Soil and Tillage Research. Elsevier Scientific, 1981.

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