APA-viite (7. p.)

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

Chicago-viite (17. p.)

Cullen, J. The Identification of Flowering Plant Families: Including a Key to Those Native and Cultivated in North Temperate Regions. 4th ed., completely rev. and edited. Cambridge, UK ; New York: Cambridge University Press, 1997.

MLA-viite (9. p.)

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