Brühl, P. (1993). A guide to the orchids of Sikkim: Being a guide to the identification of those species of orchids found between the Terai and the Northern frontier of independent Sikkim including the Chumbi Valley and British Bhutan. Singh.
Chicago Style (17th ed.) CitationBrühl, Paul. A Guide to the Orchids of Sikkim: Being a Guide to the Identification of Those Species of Orchids Found Between the Terai and the Northern Frontier of Independent Sikkim Including the Chumbi Valley and British Bhutan. Dehra Dun: Singh, 1993.
MLA (9th ed.) CitationBrühl, Paul. A Guide to the Orchids of Sikkim: Being a Guide to the Identification of Those Species of Orchids Found Between the Terai and the Northern Frontier of Independent Sikkim Including the Chumbi Valley and British Bhutan. Singh, 1993.