APA (7th ed.) Citation

Davis, P. H., & Cullen, J. (1965). The identification of flowering plant families. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Davis, P. H., and J. Cullen. The Identification of Flowering Plant Families. Edinburgh and London: Oliver and Boyd, 1965.

MLA (9th ed.) Citation

Davis, P. H., and J. Cullen. The Identification of Flowering Plant Families. Oliver and Boyd, 1965.