APA
Grierson AJC & Long DG, . (1999). Flora of Bhutan Vol. 2 (Part 2) : Including a record of Plants from Sikkim and Darjeeling .-1-872291-43-0. : Royal Botanic Garden Edinburgh, Edinburgh.
Chicago
Grierson AJC & Long DG, . 1999. Flora of Bhutan Vol. 2 (Part 2) : Including a record of Plants from Sikkim and Darjeeling .-1-872291-43-0. : Royal Botanic Garden Edinburgh, Edinburgh.
Harvard
Grierson AJC & Long DG, . (1999). Flora of Bhutan Vol. 2 (Part 2) : Including a record of Plants from Sikkim and Darjeeling .-1-872291-43-0. : Royal Botanic Garden Edinburgh, Edinburgh.
MLA
Grierson AJC & Long DG, . Flora of Bhutan Vol. 2 (Part 2) : Including a record of Plants from Sikkim and Darjeeling .-1-872291-43-0. : Royal Botanic Garden Edinburgh, Edinburgh. 1999.