Παραπομπή APA

Friedman, A. (1964). Partial differential equations of parabolic type.

Παραπομπή Chicago Style

Friedman, Avner. Partial Differential Equations of Parabolic Type. Prentice-Hall Inc., Englewood Cliffs, New Jersey, 1964.

Παραπομπή MLA

Friedman, Avner. Partial Differential Equations of Parabolic Type. 1964.