APA (7e ed.) Bronvermelding

Não informado. (1971). Ag chem and commercial fertilizer. Industry Publications.

Chicago (17e ed.) Bronvermelding

Não informado. Ag Chem and Commercial Fertilizer. Cedar Grove, NJ: Industry Publications, 1971.

MLA (8e ed.) Bronvermelding

Não informado. Ag Chem and Commercial Fertilizer. Industry Publications, 1971.

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