Cita APA

Hartley, W. H., & Vincent, W. S. (1974). American civics (2d ed.). Harcourt Brace Jovanovich.

Citación estilo Chicago

Hartley, William Harrison, and William Shafer Vincent. American Civics. 2d ed. New York: Harcourt Brace Jovanovich, 1974.

Cita MLA

Hartley, William Harrison, and William Shafer Vincent. American Civics. 2d ed. Harcourt Brace Jovanovich, 1974.