MLA

Marshall, Bruce, and Philip Boys. The Real World : Understanding the Modern World Through the New Geography. Boston: Houghton Mifflin, 1991.

APA

Marshall, B., & Boys, P. (1991). The real world : understanding the modern world through the new geography. Boston: Houghton Mifflin.

Chicago

Marshall, Bruce, and Philip Boys. The Real World: Understanding the Modern World Through the New Geography. Boston: Houghton Mifflin, 1991.