APA (7e ed.) Bronvermelding

Watkins, G. S. (1922). An introduction to the study of labor problems. Thomas Y. Crowell Co..

Chicago (17e ed.) Bronvermelding

Watkins, Gordon S. An Introduction to the Study of Labor Problems. New York: Thomas Y. Crowell Co., 1922.

MLA (8e ed.) Bronvermelding

Watkins, Gordon S. An Introduction to the Study of Labor Problems. Thomas Y. Crowell Co., 1922.