Cita APA (7th ed.)

Perry, J. A., & Perry, E. (1991). Contemporary society: An introduction to social science (6th ed.). Harper & Row.

Cita Chicago (17th ed.)

Perry, John A., i Erna Perry. Contemporary Society: An Introduction to Social Science. 6th ed. New York: Harper & Row, 1991.

Cita MLA (8th ed.)

Perry, John A., i Erna Perry. Contemporary Society: An Introduction to Social Science. 6th ed. Harper & Row, 1991.