APA (7th ed.) Citation

Bellman, R. E., & Cooke, K. L. (1971). Modern elementary differential equations (2nd ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Bellman, Richard Ernest, and Kenneth L. Cooke. Modern Elementary Differential Equations. 2nd ed. Reading [etc]: Addison-Wesley, 1971.

MLA (9th ed.) Citation

Bellman, Richard Ernest, and Kenneth L. Cooke. Modern Elementary Differential Equations. 2nd ed. Addison-Wesley, 1971.