APA (7th ed.) Citation
Copson, E. T. (1955). An introduction to the theory of functions of a complex variable. Clarendon Press.
Chicago Style (17th ed.) Citation
Copson, E. T. An Introduction to the Theory of Functions of a Complex Variable. Oxford: Clarendon Press, 1955.
MLA (9th ed.) Citation
Copson, E. T. An Introduction to the Theory of Functions of a Complex Variable. Clarendon Press, 1955.
Warning: These citations may not always be 100% accurate.