Cita APA

Willis, J. C. 1., & Shaw, H. K. A. (1973). A Dictionary of the flowering plants and ferns (Eighth edition.). Cambridge: University Press.

Citación estilo Chicago

Willis, John Christopher 1868-1958, y Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. Eighth edition. Cambridge: University Press, 1973.

Cita MLA

Willis, John Christopher 1868-1958, y Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. Eighth edition. Cambridge: University Press, 1973.