Παραπομπή APA

J.N. Sharma & Kehar Singh. (2009). Partial differential equations for engineers and scientists (2.). Narosa.

Παραπομπή Chicago Style

J.N. Sharma και Kehar Singh. Partial Differential Equations for Engineers and Scientists. 2. New Delhi: Narosa, 2009.

Παραπομπή MLA

J.N. Sharma και Kehar Singh. Partial Differential Equations for Engineers and Scientists. 2. Narosa, 2009.