Cita APA (7a ed.)

Knopp, K., & Bers, L. (1948). Problem book in the theory of functions: I, Problems in the elementary theory of functions (1st American ed.). Dover Publications.

Cita Chicago Style (17a ed.)

Knopp, Konrad, y Lipman Bers. Problem Book in the Theory of Functions: I, Problems in the Elementary Theory of Functions. 1st American ed. New York: Dover Publications, 1948.

Cita MLA (9a ed.)

Knopp, Konrad, y Lipman Bers. Problem Book in the Theory of Functions: I, Problems in the Elementary Theory of Functions. 1st American ed. Dover Publications, 1948.