APA (7th ed.) Citation

Porter, R. (1994). The Biographical dictionary of scientists (2nd ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Porter, Roy. The Biographical Dictionary of Scientists. 2nd ed. New York: Oxford University Press, 1994.

MLA (9th ed.) Citation

Porter, Roy. The Biographical Dictionary of Scientists. 2nd ed. Oxford University Press, 1994.