APA-referens (7:e uppl.)

John, F. (1982). Partial differential equations (4th ed.). Springer-Verlag.

Chicago-referens (17:e uppl.)

John, Fritz. Partial Differential Equations. 4th ed. New York: Springer-Verlag, 1982.

MLA-referens (9:e uppl.)

John, Fritz. Partial Differential Equations. 4th ed. Springer-Verlag, 1982.