APA (7th ed.) Citation

Davis, P. H., & Cullen, J. (1979). The identification of flowering plant families, including a key to those native and cultivated in north temperate regions (2d ed.). Cambrdige University Press.

Chicago Style (17th ed.) Citation

Davis, P. H., and J. Cullen. The Identification of Flowering Plant Families, Including a Key to Those Native and Cultivated in North Temperate Regions. 2d ed. Cambridge ; New York: Cambrdige University Press, 1979.

MLA (9th ed.) Citation

Davis, P. H., and J. Cullen. The Identification of Flowering Plant Families, Including a Key to Those Native and Cultivated in North Temperate Regions. 2d ed. Cambrdige University Press, 1979.