APA (7th ed.) Zitazioa

Ewing, G. M. (1985). Calculus of variations with applications. Dover.

Chicago Style (17th ed.) Zitazioa

Ewing, George M. Calculus of Variations with Applications. Nueva York: Dover, 1985.

MLA (9th ed.) Zitazioa

Ewing, George M. Calculus of Variations with Applications. Dover, 1985.