APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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