Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1952). Adult leadership. Adult Education Association of the United States of America.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Adult Leadership. Washington: Adult Education Association of the United States of America, 1952.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Adult Leadership. Adult Education Association of the United States of America, 1952.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.