APA (7th ed.) Citation

Gillin, J. L., & Gillin, J. P. (1942). An introduction to sociology. Macmillan.

Chicago Style (17th ed.) Citation

Gillin, John Lewis, and John Philip Gillin. An Introduction to Sociology. New York: Macmillan, 1942.

MLA (9th ed.) Citation

Gillin, John Lewis, and John Philip Gillin. An Introduction to Sociology. Macmillan, 1942.