APA (7th ed.) Citation

Blackmar, F. W., & Gillin, J. L. (1919). Outlines of sociology. Macmillan.

Chicago Style (17th ed.) Citation

Blackmar, Frank W., and John Lewis Gillin. Outlines of Sociology. New York: Macmillan, 1919.

MLA (8th ed.) Citation

Blackmar, Frank W., and John Lewis Gillin. Outlines of Sociology. Macmillan, 1919.