Cita APA (7th ed.)

Murnaghan, F. D. (1962). The calculus of variations (1a. ed.). Spartan Books.

Cita Chicago (17th ed.)

Murnaghan, Francis D. The Calculus of Variations. 1a. ed. Washington, D.C: Spartan Books, 1962.

Cita MLA (9th ed.)

Murnaghan, Francis D. The Calculus of Variations. 1a. ed. Spartan Books, 1962.