Παραπομπή σε μορφή APA (7η εκδ.)

Bellman, R., & Cooke, K. L. (1959). Asymptotic behavior of solutions of differential-difference equations. American Mathematical Society.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bellman, Richard, και Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. Providence, R.I.: American Mathematical Society, 1959.

Παραπομπή σε μορφή MLA (9th εκδ.)

Bellman, Richard, και Kenneth L. Cooke. Asymptotic Behavior of Solutions of Differential-difference Equations. American Mathematical Society, 1959.