APA (7th ed.) Citation

Knopp, K. (1952). Problem book in the theory of functions. Dover Publ.

Chicago Style (17th ed.) Citation

Knopp, Konrad. Problem Book in the Theory of Functions. New York, NY: Dover Publ, 1952.

MLA (9th ed.) Citation

Knopp, Konrad. Problem Book in the Theory of Functions. Dover Publ, 1952.

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