APA (7th ed.) Citation

Heinbockel, J. H. (2006). Introduction to the variational calculus. Trafford.

Chicago Style (17th ed.) Citation

Heinbockel, J. H. Introduction to the Variational Calculus. Victoria, B.C.: Trafford, 2006.

MLA (9th ed.) Citation

Heinbockel, J. H. Introduction to the Variational Calculus. Trafford, 2006.