APA (7th ed.) Citation

Gelfand, I. M., & Fomin, S. V. (2000). Calculus of variations. Dover.

Chicago Style (17th ed.) Citation

Gelfand, I. M., and S. V. Fomin. Calculus of Variations. Nueva York: Dover, 2000.

MLA (9th ed.) Citation

Gelfand, I. M., and S. V. Fomin. Calculus of Variations. Dover, 2000.