Παραπομπή APA

Simmons, G. F. (1974). Differential equations (1st.). TMH.

Παραπομπή Chicago Style

Simmons, George F. Differential Equations. 1st. New Delhi: TMH, 1974.

Παραπομπή MLA

Simmons, George F. Differential Equations. 1st. TMH, 1974.