Citazione APA

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

Stile di citazione Chicago

Willis, J. C., e Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. 8th ed. Cambridge [Eng.]: University Press, 1973.

Citazione MLA

Willis, J. C., e Herbert Kenneth Airy Shaw. A Dictionary of the Flowering Plants and Ferns. 8th ed. University Press, 1973.