Cita APA (7a ed.)

Keats, J. (1996). Understanding maps (2nd ed.). Longman.

Cita Chicago Style (17a ed.)

Keats, J.S. Understanding Maps. 2nd ed. London: Longman, 1996.

Cita MLA (9a ed.)

Keats, J.S. Understanding Maps. 2nd ed. Longman, 1996.