Cita APA (7a ed.)

Kimball, W. (1952). Calculus of variations, by parallel displacement. Butterworths Scientific Publications.

Cita Chicago Style (17a ed.)

Kimball, W.S. Calculus of Variations, by Parallel Displacement. London: Butterworths Scientific Publications, 1952.

Cita MLA (9a ed.)

Kimball, W.S. Calculus of Variations, by Parallel Displacement. Butterworths Scientific Publications, 1952.