APA (7th ed.) Citation

Moore, D. M. (1991). The guinness guide to plants of the world (1992 ed.). Guinness Publishing.

Chicago Style (17th ed.) Citation

Moore, D. M. The Guinness Guide to Plants of the World. 1992 ed. London: Guinness Publishing, 1991.

MLA (9th ed.) Citation

Moore, D. M. The Guinness Guide to Plants of the World. 1992 ed. Guinness Publishing, 1991.