Proctor, W. M. (1933). Vocations: The world's work and its workers (Rev. and enl. ed.). Houghton Mifflin Company.
Citação do estilo Chicago (17ª ed.)Proctor, William Martin. Vocations: The World's Work and Its Workers. Rev. and enl. ed. Boston : New York [etc.]: Houghton Mifflin Company, 1933.
Citação MLA (8ª ed.)Proctor, William Martin. Vocations: The World's Work and Its Workers. Rev. and enl. ed. Houghton Mifflin Company, 1933.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.