Παραπομπή APA

G Harold. (1985). Erosion: Its causes and cure. International book distributors.

Παραπομπή Chicago Style

G Harold. Erosion: Its Causes and Cure. New Delhi: International book distributors, 1985.

Παραπομπή MLA

G Harold. Erosion: Its Causes and Cure. International book distributors, 1985.