Cita APA (7a ed.)

Bellman, R. E., & Cooke, K. L. (1963). Differential-difference equations. Academic Press.

Cita Chicago Style (17a ed.)

Bellman, Richard E., y Kenneth L. Cooke. Differential-difference Equations. New York: Academic Press, 1963.

Cita MLA (9a ed.)

Bellman, Richard E., y Kenneth L. Cooke. Differential-difference Equations. Academic Press, 1963.