APA (7th ed.) Citation

Bellman, R. E. (1964). Perturbation techniques in mathematics, physics, and engineering. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Citation

Bellman, Richard Ernest. Perturbation Techniques in Mathematics, Physics, and Engineering. New York: Holt, Rinehart and Winston, 1964.

MLA (9th ed.) Citation

Bellman, Richard Ernest. Perturbation Techniques in Mathematics, Physics, and Engineering. Holt, Rinehart and Winston, 1964.