Cita APA (7a ed.)

Dury, G. H., & East, W. G. (1966). World geography - physical (7. impression.). Nelson.

Cita Chicago Style (17a ed.)

Dury, Georg H., y W. G. East. World Geography - Physical. 7. impression. London [u.a.]: Nelson, 1966.

Cita MLA (9a ed.)

Dury, Georg H., y W. G. East. World Geography - Physical. 7. impression. Nelson, 1966.