Beardon, A. F. (1979). Complex analysis: the argument principle in analysis and topology. Wiley.
Jameson, G. J. O. (1970). A first course on complex functions: Vol. Chapman&Hall mathematics series. Chapman & Hall.
Nehari, Z. (1961). Introduction to complex analysis: Vol. College mathematics series. Allyn and Bacon.
Stewart, I., & Tall, D. O. (1983). Complex analysis: the hitchhiker’s guide to the plane. Cambridge University Press.
Tall, D. O. (1977). Functions of a complex variable: Vol. Library of mathematics. Routledge and Kegan Paul [etc.].
Wunsch, A. D. (2005). Complex variables with applications (3rd ed). Pearson Addison-Wesley.