APA (7e ed.) Bronvermelding

Sowers, J. I. (1925). The boy and his vocation. The Manual arts press.

Chicago (17e ed.) Bronvermelding

Sowers, John Irving. The Boy and His Vocation. Peoria, Ill.: The Manual arts press, 1925.

MLA (8e ed.) Bronvermelding

Sowers, John Irving. The Boy and His Vocation. The Manual arts press, 1925.