APA (7th ed.) Citation

Knopp, K., & Bagemihl, F. Theory of functions. Dover Publications.

Chicago Style (17th ed.) Citation

Knopp, Konrad, and Frederick Bagemihl. Theory of Functions. New York: Dover Publications.

MLA (8th ed.) Citation

Knopp, Konrad, and Frederick Bagemihl. Theory of Functions. Dover Publications.

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