Παραπομπή APA

Rana, M. (1990). Forest extension. Bishen Singh, Mahendra Pal Singh.

Παραπομπή Chicago Style

Rana, M.S. Forest Extension. Dehra Dun: Bishen Singh, Mahendra Pal Singh, 1990.

Παραπομπή MLA

Rana, M.S. Forest Extension. Bishen Singh, Mahendra Pal Singh, 1990.