Παραπομπή APA

Tejvir Singh. (1980). Studies in Himalayan ecology. English book store.

Παραπομπή Chicago Style

Tejvir Singh. Studies in Himalayan Ecology. New Delhi: English book store, 1980.

Παραπομπή MLA

Tejvir Singh. Studies in Himalayan Ecology. English book store, 1980.