Cita APA (7a ed.)

Thom, M., Armstrong, E., & Royle, S. A. (2017). Geography for CCEA A2 Level (A2 Level, 2nd edition.). Colourpoint Educational.

Cita Chicago Style (17a ed.)

Thom, Martin, Eileen Armstrong, y Stephen A. Royle. Geography for CCEA A2 Level. A2 Level, 2nd edition. Newtownards, County Down, Northern Ireland: Colourpoint Educational, 2017.

Cita MLA (9a ed.)

Thom, Martin, et al. Geography for CCEA A2 Level. A2 Level, 2nd edition. Colourpoint Educational, 2017.