Cita APA (7a ed.)

Elsgolc, L. E. (1962). Calculus of variations. Pergamon Press.

Cita Chicago Style (17a ed.)

Elsgolc, L. E. Calculus of Variations. London: Pergamon Press, 1962.

Cita MLA (9a ed.)

Elsgolc, L. E. Calculus of Variations. Pergamon Press, 1962.