APA citiranje

Robson, N. K. B. (1981). Studies in the genus Hypericum L. (Guttiferae): 2. characters of the genus. British Museum (Natural History).

Chicago Style (17th ed.) Citation

Robson, N. K. B. Studies in the Genus Hypericum L. (Guttiferae): 2. Characters of the Genus. London: British Museum (Natural History), 1981.

MLA citiranje

Robson, N. K. B. Studies in the Genus Hypericum L. (Guttiferae): 2. Characters of the Genus. British Museum (Natural History), 1981.