Cita APA

Key, V. O. (1947). Politics, parties and pressure groups (2d ed.). Thomas Y. Crowell Co.

Citación estilo Chicago

Key, V. O. Politics, Parties and Pressure Groups. 2d ed. New York: Thomas Y. Crowell Co, 1947.

Cita MLA

Key, V. O. Politics, Parties and Pressure Groups. 2d ed. Thomas Y. Crowell Co, 1947.