APA aipamena

Duthie, J. F. (1979). Orchids of the North - Western Himalaya. Bishen Singh Mahendra Pal Singh.

Chicago Style aipamena

Duthie, J F. Orchids of the North - Western Himalaya. Dehradun: Bishen Singh Mahendra Pal Singh, 1979.

MLA aipamena

Duthie, J F. Orchids of the North - Western Himalaya. Bishen Singh Mahendra Pal Singh, 1979.