Joseph, J. (1987). Orchids of Nilgiris.
Chicago Style aipamenaJoseph, J. Orchids of Nilgiris. New Delhi, Botanical Survey of India, 1987.
MLA aipamenaJoseph, J. Orchids of Nilgiris. 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
Joseph, J. (1987). Orchids of Nilgiris.
Chicago Style aipamenaJoseph, J. Orchids of Nilgiris. New Delhi, Botanical Survey of India, 1987.
MLA aipamenaJoseph, J. Orchids of Nilgiris. 1987.