APA Edition Citation

Heywood,Ian,et al. (1988). An Introdoctionto Geographical Information Systems. Longman.

Chicago Edition Citation

Heywood,Ian,et al. An Introdoctionto Geographical Information Systems. London: Longman, 1988.

MLA Edition Citation

Heywood,Ian,et al. An Introdoctionto Geographical Information Systems. Longman, 1988.

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