APA-referens (7:e uppl.)

Willis, J. C., & Shaw, H. K. A. (1973). A dictionary of the flowering plants and ferns (8th ed.). Cambridge University Press.

Chicago-referens (17:e uppl.)

Willis, John Christopher, och Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. 8th ed. London: Cambridge University Press, 1973.

MLA-referens (8:e uppl.)

Willis, John Christopher, och Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. 8th ed. Cambridge University Press, 1973.