APA (7th ed.) Citation

Sledge, W. A. (1981). The Thelypteridaceae of Ceylon. British Museum (Natural History).

Chicago Style (17th ed.) Citation

Sledge, W. A. The Thelypteridaceae of Ceylon. London: British Museum (Natural History), 1981.

MLA (9th ed.) Citation

Sledge, W. A. The Thelypteridaceae of Ceylon. British Museum (Natural History), 1981.

Warning: These citations may not always be 100% accurate.