APA (7th ed.) Citation

Cohen, I. D. (1929). Principles and practices of vocational guidance. The Century co.

Chicago Style (17th ed.) Citation

Cohen, Isidore David. Principles and Practices of Vocational Guidance. New York: The Century co, 1929.

MLA (9th ed.) Citation

Cohen, Isidore David. Principles and Practices of Vocational Guidance. The Century co, 1929.