APA ציטוט

Wadsworth, R., & Treweek, J. . O. (1999). Geographical information systems for ecology: An introduction. Longman.

Chicago Edition Citation

Wadsworth, Richard, and J O. Treweek. Geographical Information Systems for Ecology: An Introduction. London: Longman, 1999.

ציטוט MLA

Wadsworth, Richard, and J O. Treweek. Geographical Information Systems for Ecology: An Introduction. Longman, 1999.