Naveen Kumar. (2005). Elementary course on variational problems in calculus (1st.). Narosa.
Čikaški stil citiranjaNaveen Kumar. Elementary Course on Variational Problems in Calculus. 1st. New Delhi: Narosa, 2005.
MLA način citiranjaNaveen Kumar. Elementary Course on Variational Problems in Calculus. 1st. Narosa, 2005.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.