Cita APA (7a ed.)

Unwin, D. J., & Dawson, J. A. (1985). Computer programming for geographers. Longman.

Cita Chicago Style (17a ed.)

Unwin, David John, y John A. Dawson. Computer Programming for Geographers. London: Longman, 1985.

Cita MLA (9a ed.)

Unwin, David John, y John A. Dawson. Computer Programming for Geographers. Longman, 1985.