Cita APA (7th ed.)

Petrovsky, I. G. (1967). Partial differential equations. W. B. Saunders.

Cita Chicago (17th ed.)

Petrovsky, Ivan Georgievich. Partial Differential Equations. Filadelfia: W. B. Saunders, 1967.

Cita MLA (9th ed.)

Petrovsky, Ivan Georgievich. Partial Differential Equations. W. B. Saunders, 1967.