Παραπομπή APA

Haslam, S. (1991). River Pollution: An Ecological Perspective. CBS colllege.

Παραπομπή Chicago Style

Haslam, S.M. River Pollution: An Ecological Perspective. Delhi: CBS colllege, 1991.

Παραπομπή MLA

Haslam, S.M. River Pollution: An Ecological Perspective. CBS colllege, 1991.