APA (7th ed.) Citation

Knopp, K. (1948). Problem book in the theory of functions ([1st American ed.].). Dover Publications.

Chicago Style (17th ed.) Citation

Knopp, Konrad. Problem Book in the Theory of Functions. [1st American ed.]. New York: Dover Publications, 1948.

MLA (8th ed.) Citation

Knopp, Konrad. Problem Book in the Theory of Functions. [1st American ed.]. Dover Publications, 1948.