Cita APA (7th ed.)

Palen, J. J. (1992). The Urban World (4th ed.). McGraw-Hill, Inc.

Cita Chicago (17th ed.)

Palen, J. John. The Urban World. 4th ed. New York: McGraw-Hill, Inc, 1992.

Cita MLA (9th ed.)

Palen, J. John. The Urban World. 4th ed. McGraw-Hill, Inc, 1992.