Cita APA (7th ed.)

Elsgolc, L. E. (1961). Calculus of variations. Addison-Wesley.

Cita Chicago (17th ed.)

Elsgolc, L. E. Calculus of Variations. Reading: Addison-Wesley, 1961.

Cita MLA (9th ed.)

Elsgolc, L. E. Calculus of Variations. Addison-Wesley, 1961.