APA (7e ed.) Bronvermelding

Não informado. (1989). Adults Learning. National Institute of Adult Continuing Education.

Chicago (17e ed.) Bronvermelding

Não informado. Adults Learning. Leicester, Inglaterra: National Institute of Adult Continuing Education, 1989.

MLA (8e ed.) Bronvermelding

Não informado. Adults Learning. National Institute of Adult Continuing Education, 1989.

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