APA (7th ed.) Citation

Dacorogna, B. (2008). Direct methods in the calculus of variations (Second edition.). Springer.

Chicago Style (17th ed.) Citation

Dacorogna, Bernard. Direct Methods in the Calculus of Variations. Second edition. New York, NY: Springer, 2008.

MLA (9th ed.) Citation

Dacorogna, Bernard. Direct Methods in the Calculus of Variations. Second edition. Springer, 2008.