Cita APA (7a ed.)

Ross, S. R. J. (2007). Essential mapwork skills. Nelson Thornes.

Cita Chicago Style (17a ed.)

Ross, Simon R. J. Essential Mapwork Skills. Cheltenham: Nelson Thornes, 2007.

Cita MLA (9a ed.)

Ross, Simon R. J. Essential Mapwork Skills. Nelson Thornes, 2007.