Cita APA (7th ed.)

Petrovskiĭ, I. G. (1967). Partial differential equations. Iliffe Books.

Cita Chicago (17th ed.)

Petrovskiĭ, I. G. Partial Differential Equations. London: Iliffe Books, 1967.

Cita MLA (8th ed.)

Petrovskiĭ, I. G. Partial Differential Equations. Iliffe Books, 1967.