Brown, J. W., & Churchill, R. V. (2009). Complex variables and applications (8th edition.). McGraw-Hill Higher Education.

Brown, James Ward, and Ruel V. Churchill. Complex Variables and Applications. 8th edition. New Delhi ; Boston: McGraw-Hill Higher Education, 2009.

Brown, James Ward, and Ruel V. Churchill. Complex Variables and Applications. 8th edition. McGraw-Hill Higher Education, 2009.