Citazione Stile APA (7a Edizione)

U.S. Employment service, Stead, W. H., Shartle, C. L., & Otis, J. L. (1940). Occupational counseling techniques, their development and application. American book company.

Citazione stile Chigago Style (17a edizione)

U.S. Employment service, William Henry Stead, Carroll L. Shartle, e Jay Lester Otis. Occupational Counseling Techniques, Their Development and Application. New York: American book company, 1940.

Citatione MLA (9a ed.)

U.S. Employment service, et al. Occupational Counseling Techniques, Their Development and Application. American book company, 1940.