Παραπομπή APA

Watkins, L. (1981). Environmental impact of roads and traffic. Applied Science Pub.

Παραπομπή Chicago Style

Watkins, L.H. Environmental Impact of Roads and Traffic. London: Applied Science Pub, 1981.

Παραπομπή MLA

Watkins, L.H. Environmental Impact of Roads and Traffic. Applied Science Pub, 1981.