APA引文

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

Chicago Edition Citation

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

MLA引文

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

警告：这些引文格式不一定是100％准确.