APA (7th ed.) Citation

Gray, R. D. (1979). Christopher Wren and St. Paul's Cathedral. Cambridge University Press.

Chicago Style (17th ed.) Citation

Gray, Ronald D. Christopher Wren and St. Paul's Cathedral. Cambridge [England] ; New York: Cambridge University Press, 1979.

MLA (9th ed.) Citation

Gray, Ronald D. Christopher Wren and St. Paul's Cathedral. Cambridge University Press, 1979.