Gaya APA

Haen, R, D., Flaschka, H, A. (1990). Transport Policy and the Environment. (First ed. (Six case studies)). London: Earthscan Publ. Ltd.

Gaya MLA

Haen, Riedel, De., Flaschka, H, A. "Transport Policy and the Environment.". First ed. (Six case studies) London: Earthscan Publ. Ltd, 1990. Text.