APA (7th ed.) Citation

Elsgolc, L. D. (2007). Calculus of variations. Dover.

Chicago Style (17th ed.) Citation

Elsgolc, Lev D. Calculus of Variations. Mineola, N.Y.: Dover, 2007.

MLA (9th ed.) Citation

Elsgolc, Lev D. Calculus of Variations. Dover, 2007.