APA (7th ed.) Citation

Courant, R. (1948). The theory of functions of a complex variable. New York University.

Chicago Style (17th ed.) Citation

Courant, Richard. The Theory of Functions of a Complex Variable. New York: New York University, 1948.

MLA (9th ed.) Citation

Courant, Richard. The Theory of Functions of a Complex Variable. New York University, 1948.

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