APA aipamena

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

Chicago Style aipamena

Gelfand, I.M, and S.V Fomin. Calculus of Variations. Prentice - Hall, 1963.

MLA aipamena

Gelfand, I.M, and S.V Fomin. Calculus of Variations. Prentice - Hall, 1963.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.