APA (7e ed.) Bronvermelding

Não informado. (1968). Journal of the Soil Association. Soil Association.

Chicago (17e ed.) Bronvermelding

Não informado. Journal of the Soil Association. London: Soil Association, 1968.

MLA (8e ed.) Bronvermelding

Não informado. Journal of the Soil Association. Soil Association, 1968.

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