APA (7th ed.) Citation

Gelfand, I. M. (1963). Calculus of variations. Prentice-Hall.

Chicago Style (17th ed.) Citation

Gelfand, I. M. Calculus of Variations. Englewood Cliff, New Jersey: Prentice-Hall, 1963.

MLA (9th ed.) Citation

Gelfand, I. M. Calculus of Variations. Prentice-Hall, 1963.