एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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