APA (7th ed.) Citation

Petrovskij, I. G. (1991). Lectures on partial differential equations (Unabridged and unaltered republ. of the 4. print. (1964).). Dover Publ.

Chicago Style (17th ed.) Citation

Petrovskij, Ivan G. Lectures on Partial Differential Equations. Unabridged and unaltered republ. of the 4. print. (1964). New York: Dover Publ, 1991.

MLA (9th ed.) Citation

Petrovskij, Ivan G. Lectures on Partial Differential Equations. Unabridged and unaltered republ. of the 4. print. (1964). Dover Publ, 1991.