एपीए उद्धरण

Kumar, R., & Kumar,Nagendra. (2013). Differential equations and calculus of variations. CBS.

शिकागो स्टाइल उद्धरण

Kumar, Rakesh, और Kumar,Nagendra. Differential Equations and Calculus of Variations. New Delhi: CBS, 2013.

एमएलए उद्धरण

Kumar, Rakesh, और Kumar,Nagendra. Differential Equations and Calculus of Variations. CBS, 2013.