APA (7th ed.) Citation

Cullen, J. (1997). The identification of flowering plant families: Including a key to those native and cultivated in north temperate regions (4. ed., completely rev. and ed.). Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Cullen, James. The Identification of Flowering Plant Families: Including a Key to Those Native and Cultivated in North Temperate Regions. 4. ed., completely rev. and ed. Cambridge [u.a.]: Cambridge Univ. Press, 1997.

MLA (9th ed.) Citation

Cullen, James. The Identification of Flowering Plant Families: Including a Key to Those Native and Cultivated in North Temperate Regions. 4. ed., completely rev. and ed. Cambridge Univ. Press, 1997.