MLA

Agarwal, Ravi P, and Donal O'Regan. An Introduction to Ordinary Differential Equations. Springer New York, 2008.

APA

Agarwal, R. P, & O'Regan, D. (2008). An Introduction to Ordinary Differential Equations. Springer New York.

Chicago

Agarwal, Ravi P., and Donal O'Regan. An Introduction to Ordinary Differential Equations. : Springer New York, 2008.