APA (7th ed.) Citation

Bellman, R. (1972). Perturbation techniques in mathematics, physics, and engineering. Dover Publications.

Chicago Style (17th ed.) Citation

Bellman, Richard. Perturbation Techniques in Mathematics, Physics, and Engineering. New York: Dover Publications, 1972.

MLA (9th ed.) Citation

Bellman, Richard. Perturbation Techniques in Mathematics, Physics, and Engineering. Dover Publications, 1972.

Warning: These citations may not always be 100% accurate.