APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Unwin, David J., and John A.;Unwin Dawson. Computer Programming for Geographers. Longman, 1985.

MLA (9th ed.) Citation

Unwin, David J., and John A.;Unwin Dawson. Computer Programming for Geographers. Longman, 1985.

Warning: These citations may not always be 100% accurate.