Παραπομπή APA

Gelfand, T. M., & Fomin, S. V. (1963). Calculus of variations. Prentice-Hall of India.

Παραπομπή Chicago Style

Gelfand, T M., και S V. Fomin. Calculus of Variations. New Jersey: Prentice-Hall of India, 1963.

Παραπομπή MLA

Gelfand, T M., και S V. Fomin. Calculus of Variations. Prentice-Hall of India, 1963.