Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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