APA citiranje

Costa, D. G. (2007). An invitation to variational methods in differential equations. Birkhauser.

Chicago Style (17th ed.) Citation

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

MLA citiranje

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