Παραπομπή APA

Foot,David. (1981). Operational urban models: An introduction. Methuen & Co. Ltd.

Παραπομπή Chicago Style

Foot,David. Operational Urban Models: An Introduction. London: Methuen & Co. Ltd, 1981.

Παραπομπή MLA

Foot,David. Operational Urban Models: An Introduction. Methuen & Co. Ltd, 1981.