Cita APA (7a ed.)

Knowles, R., & Wareing, J. (1979). Economic and social geography made simple (2nd ed.). W. H. Allen.

Cita Chicago Style (17a ed.)

Knowles, Richard, y John Wareing. Economic and Social Geography Made Simple. 2nd ed. London: W. H. Allen, 1979.

Cita MLA (9a ed.)

Knowles, Richard, y John Wareing. Economic and Social Geography Made Simple. 2nd ed. W. H. Allen, 1979.