Παραπομπή APA

Liebertein, H. M. (1972). Theory of partial differential equations. Academic Press.

Παραπομπή Chicago Style

Liebertein, H. Melvin. Theory of Partial Differential Equations. New York: Academic Press, 1972.

Παραπομπή MLA

Liebertein, H. Melvin. Theory of Partial Differential Equations. Academic Press, 1972.