Cita APA (7a ed.)

Gelfand, I., & Fomin, S. (1963). Calculus of variations (1a ed.). Prentice-Hall International.

Cita Chicago Style (17a ed.)

Gelfand, I.M, y S.V Fomin. Calculus of Variations. 1a ed. Englewood Cl: Prentice-Hall International, 1963.

Cita MLA (9a ed.)

Gelfand, I.M, y S.V Fomin. Calculus of Variations. 1a ed. Prentice-Hall International, 1963.