Παραπομπή APA

Spiegel, M. R. (1971). Theory and problems of calculus of finite differences and differential equations. Mc Graw - Hill.

Παραπομπή Chicago Style

Spiegel, Murray R. Theory and Problems of Calculus of Finite Differences and Differential Equations. New York: Mc Graw - Hill, 1971.

Παραπομπή MLA

Spiegel, Murray R. Theory and Problems of Calculus of Finite Differences and Differential Equations. Mc Graw - Hill, 1971.