APA (7e ed.) Bronvermelding

Não informado. (1978). Rural Extension, Education and Training Abstracts. Commonwealth Agricultural Bureau.

Chicago (17e ed.) Bronvermelding

Não informado. Rural Extension, Education and Training Abstracts. Farnham Royal, Inglaterra: Commonwealth Agricultural Bureau, 1978.

MLA (8e ed.) Bronvermelding

Não informado. Rural Extension, Education and Training Abstracts. Commonwealth Agricultural Bureau, 1978.

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