APA (7e ed.) Bronvermelding

Não informado. (1967). Abstracts. Weed Science Society of America.

Chicago (17e ed.) Bronvermelding

Não informado. Abstracts. Champaign, Ill: Weed Science Society of America, 1967.

MLA (8e ed.) Bronvermelding

Não informado. Abstracts. Weed Science Society of America, 1967.

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