APA (7th ed.) Citation

Copson, E. T. (1972). 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, 1972.

MLA (9th ed.) Citation

Copson, E. T. An Introduction to the Theory of Functions of a Complex Variable. Clarendon Press, 1972.

Warning: These citations may not always be 100% accurate.