Cita APA (7a ed.)

Waugh, D., & Bushell, T. (2006). New key geography (4. ed.). Nelson Thornes.

Cita Chicago Style (17a ed.)

Waugh, David, y Tony Bushell. New Key Geography. 4. ed. Cheltenham: Nelson Thornes, 2006.

Cita MLA (9a ed.)

Waugh, David, y Tony Bushell. New Key Geography. 4. ed. Nelson Thornes, 2006.