APA (7 वां संस्करण) प्रशस्ति पत्र

Bellman, R., & Cooke, K. L. (1965). Asymptotic behavior of solutions of differential-difference equations. American Mathematical Society.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Bellman, Richard, और Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. Providence, R.I: American Mathematical Society, 1965.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Bellman, Richard, और Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. American Mathematical Society, 1965.