APA (7th ed.) Citation

Berenstein, C. A., & Gay, R. (1991). Complex variables: An introduction. Springer-Verlag.

Chicago Style (17th ed.) Citation

Berenstein, Carlos A., and R. Gay. Complex Variables: An Introduction. New York: Springer-Verlag, 1991.

MLA (9th ed.) Citation

Berenstein, Carlos A., and R. Gay. Complex Variables: An Introduction. Springer-Verlag, 1991.