APA (7th ed.) Zitazioa

Fox, C. (1987). An introduction to the calculus of variations. Dover.

Chicago Style (17th ed.) Zitazioa

Fox, Charles. An Introduction to the Calculus of Variations. Nueva York: Dover, 1987.

MLA (9th ed.) Zitazioa

Fox, Charles. An Introduction to the Calculus of Variations. Dover, 1987.