Cita APA (7a ed.)

Bradford, M. G., Kent, A., & Bradford, M. (1993). Understanding human geography: People and their changing environments. Oxford Univ. Press.

Cita Chicago Style (17a ed.)

Bradford, Michael G., Ashley Kent, y Michael Bradford. Understanding Human Geography: People and Their Changing Environments. Oxford [u.a.]: Oxford Univ. Press, 1993.

Cita MLA (9a ed.)

Bradford, Michael G., et al. Understanding Human Geography: People and Their Changing Environments. Oxford Univ. Press, 1993.