Παραπομπή APA

Ditzian, Z., & Totik, V. (1987). Moduli of smoothness. Springer-Verlag.

Παραπομπή Chicago Style

Ditzian, Zeev, και V. Totik. Moduli of Smoothness. New York: Springer-Verlag, 1987.

Παραπομπή MLA

Ditzian, Zeev, και V. Totik. Moduli of Smoothness. Springer-Verlag, 1987.