Cita APA (7a ed.)

Dilley, L., Earle, J., Keats, G., Ravenscroft, G., & Euston-Brown, K. (2009). Focus on geography (21. impr.). Maskew Miller Longman.

Cita Chicago Style (17a ed.)

Dilley, Liz, John Earle, Graham Keats, G. Ravenscroft, y Kim Euston-Brown. Focus on Geography. 21. impr. Pinelands, Cape Town: Maskew Miller Longman, 2009.

Cita MLA (9a ed.)

Dilley, Liz, et al. Focus on Geography. 21. impr. Maskew Miller Longman, 2009.