APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Etgen, Garret J. An Introduction to Ordinary Differential Equations: With Difference Equations, Numerical Methods, and Applications. New York: Harper and Row, 1977.

MLA (9th ed.) Citation

Etgen, Garret J. An Introduction to Ordinary Differential Equations: With Difference Equations, Numerical Methods, and Applications. Harper and Row, 1977.