APA (7th ed.) Citation

Costa, D. G. (2007). An Invitation to Variational Methods in Differential Equations. Birkhäuser Boston.

Chicago Style (17th ed.) Citation

Costa, David G. An Invitation to Variational Methods in Differential Equations. Boston, MA: Birkhäuser Boston, 2007.

MLA (8th ed.) Citation

Costa, David G. An Invitation to Variational Methods in Differential Equations. Birkhäuser Boston, 2007.

Warning: These citations may not always be 100% accurate.