APA-referens (7:e uppl.)

Ford, L. R. (1955). Differential equations (2nd.ed.). McGraw-hill.

Chicago-referens (17:e uppl.)

Ford, Lester R. Differential Equations. 2nd.ed. New York: McGraw-hill, 1955.

MLA-referens (9:e uppl.)

Ford, Lester R. Differential Equations. 2nd.ed. McGraw-hill, 1955.