Brown, J. W., & Churchill, R. V. (1996). Complex variables and applications (6th ed.). McGraw-Hill.

Brown, James Ward, and Ruel Vance Churchill. Complex Variables and Applications. 6th ed. New York: McGraw-Hill, 1996.

Brown, James Ward, and Ruel Vance Churchill. Complex Variables and Applications. 6th ed. McGraw-Hill, 1996.