APA (7th ed.) Citation

Gamow, G. (1961). The creation of the universe (Rev. ed.). Viking Press.

Chicago Style (17th ed.) Citation

Gamow, George. The Creation of the Universe. Rev. ed. New York: Viking Press, 1961.

MLA (8th ed.) Citation

Gamow, George. The Creation of the Universe. Rev. ed. Viking Press, 1961.