APA

Crowley T. J., North G. R. & Oxford University Press. (1991). Paleoclimatology. New York: Oxford University Press.

Chicago

Crowley Thomas J, North Gerald R and Oxford University Press. 1991. Paleoclimatology. New York: Oxford University Press.

Harvard

Crowley T. J., North G. R. and Oxford University Press. (1991). Paleoclimatology. New York: Oxford University Press.

MLA

Crowley Thomas J, North Gerald R and Oxford University Press. Paleoclimatology. New York: Oxford University Press. 1991.