Παραπομπή σε μορφή APA (7η εκδ.)

Proctor, W. M. (1933). Vocations: The world's work and its workers (Rev. and enl. ed.). Houghton Mifflin Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Proctor, William Martin. Vocations: The World's Work and Its Workers. Rev. and enl. ed. Boston : New York [etc.]: Houghton Mifflin Company, 1933.

Παραπομπή σε μορφή MLA (8th εκδ.)

Proctor, William Martin. Vocations: The World's Work and Its Workers. Rev. and enl. ed. Houghton Mifflin Company, 1933.