APA (7th ed.) Citation

Clapham, A. R., & Nicholson, B. (1975). The Oxford book of trees. Oxford University Press.

Chicago Style (17th ed.) Citation

Clapham, A. R., and Barbara Nicholson. The Oxford Book of Trees. London ; New York: Oxford University Press, 1975.

MLA (9th ed.) Citation

Clapham, A. R., and Barbara Nicholson. The Oxford Book of Trees. Oxford University Press, 1975.