APA (7th ed.) Citation

Proctor, W. M. (1929). Vocations: The world's work and its workers. Houghton Mifflin company.

Chicago Style (17th ed.) Citation

Proctor, William Martin. Vocations: The World's Work and Its Workers. Boston, New York [etc.]: Houghton Mifflin company, 1929.

MLA (9th ed.) Citation

Proctor, William Martin. Vocations: The World's Work and Its Workers. Houghton Mifflin company, 1929.