APA-referens

Etgen, G. J., & Morris, W. L. (1977). Introduction to ordinary differential equations: With difference equations, numerical methods, and applications. Harper & Row.

Chicago-stil citat

Etgen, Garret J., och William L. Morris. Introduction to Ordinary Differential Equations: With Difference Equations, Numerical Methods, and Applications. New York: Harper & Row, 1977.

MLA-referens

Etgen, Garret J., och William L. Morris. Introduction to Ordinary Differential Equations: With Difference Equations, Numerical Methods, and Applications. Harper & Row, 1977.