APA (7th ed.) Citation

Graham, E. H. (1934). Flora of the Kartabo region, British Guiana. [publisher not identified].

Chicago Style (17th ed.) Citation

Graham, Edward Harrison. Flora of the Kartabo Region, British Guiana. [Pittsburgh?]: [publisher not identified], 1934.

MLA (9th ed.) Citation

Graham, Edward Harrison. Flora of the Kartabo Region, British Guiana. [publisher not identified], 1934.