APA (7th ed.) Citation

Hodgson, M. (1991). Letts guide to orchids of the world. Charles Letts & Co Ltd..

Chicago Style (17th ed.) Citation

Hodgson, Margaret. Letts Guide to Orchids of the World. London: Charles Letts & Co Ltd., 1991.

MLA (9th ed.) Citation

Hodgson, Margaret. Letts Guide to Orchids of the World. Charles Letts & Co Ltd., 1991.

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