Παραπομπή APA

Naveen Kumar. (2005). Elementary course on variational problems in calculus (1st.). Narosa.

Παραπομπή Chicago Style

Naveen Kumar. Elementary Course on Variational Problems in Calculus. 1st. New Delhi: Narosa, 2005.

Παραπομπή MLA

Naveen Kumar. Elementary Course on Variational Problems in Calculus. 1st. Narosa, 2005.