Cita APA (7a ed.)

Dilley, L., Earle, J., Keats, G., & Ravenscroft, G. (2009). Focus on geography (1. ed. 2003, 2. ed. 2005, 3. ed. 2008, 7. impr.). Maskew Miller Longman.

Cita Chicago Style (17a ed.)

Dilley, Liz, John Earle, Graham Keats, y G. Ravenscroft. Focus on Geography. 1. ed. 2003, 2. ed. 2005, 3. ed. 2008, 7. impr. Pinelands, Cape Town: Maskew Miller Longman, 2009.

Cita MLA (9a ed.)

Dilley, Liz, et al. Focus on Geography. 1. ed. 2003, 2. ed. 2005, 3. ed. 2008, 7. impr. Maskew Miller Longman, 2009.