Cita APA

Duncan, W. R., Switky, B., & Jancar-Webster, B. (2009). World politics in the 21st century: Student choice edition. Boston, New York: Houghton Mifflin Harcourt.

Citación estilo Chicago

Duncan, W. Raymond, Bob Switky, and Barbara Jancar-Webster. World Politics in the 21st Century: Student Choice Edition. Boston, New York: Houghton Mifflin Harcourt, 2009.

Cita MLA

Duncan, W. Raymond, Bob Switky, and Barbara Jancar-Webster. World Politics in the 21st Century: Student Choice Edition. Boston, New York: Houghton Mifflin Harcourt, 2009.