Παραπομπή APA

Ayres,Frank. (1952). Theory and problems of differential equations. McGraw-Hill.

Παραπομπή Chicago Style

Ayres,Frank. Theory and Problems of Differential Equations. New york: McGraw-Hill, 1952.

Παραπομπή MLA

Ayres,Frank. Theory and Problems of Differential Equations. McGraw-Hill, 1952.