APA (7th ed.) Citation

Willis, J. C. (1951). A dictionary of the flowering plants and ferns (6. ed., revised.). University Press.

Chicago Style (17th ed.) Citation

Willis, John Christopher. A Dictionary of the Flowering Plants and Ferns. 6. ed., revised. Cambridge: University Press, 1951.

MLA (9th ed.) Citation

Willis, John Christopher. A Dictionary of the Flowering Plants and Ferns. 6. ed., revised. University Press, 1951.