APA-Zitierstil (7. Ausg.)

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

Chicago-Zitierstil (17. Ausg.)

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

MLA-Zitierstil (8. Ausg.)

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

Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.