APA (7th ed.) Zitazioa

Petrovsky, I. G. (1991). Lectures on partial differential equations. Dover.

Chicago Style (17th ed.) Zitazioa

Petrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Nueva York: Dover, 1991.

MLA (9th ed.) Zitazioa

Petrovsky, Ivan Georgievich. Lectures on Partial Differential Equations. Dover, 1991.