Παραπομπή APA

Ayres, F. (1972). Theory and problems of differential equations. McGraw - Hill.

Παραπομπή Chicago Style

Ayres, Frank. Theory and Problems of Differential Equations. New York: McGraw - Hill, 1972.

Παραπομπή MLA

Ayres, Frank. Theory and Problems of Differential Equations. McGraw - Hill, 1972.