Ross, S. L., & Ross, S. L. (1989). Introduction to ordinary differential equations (4th ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Ross, Shepley L., agus Shepley L. Ross. Introduction to Ordinary Differential Equations. 4th ed. New York: Wiley, 1989.
Lua MLA (8ú heag.)Ross, Shepley L., agus Shepley L. Ross. Introduction to Ordinary Differential Equations. 4th ed. Wiley, 1989.
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