APA (7th ed.) Citation

Chern, B., & Tubis, A. (1967). Invariance principles in classical and quantum mechanics. American Journal of Physics, 35, 254.

Chicago Style (17th ed.) Citation

Chern, B., and A. Tubis. "Invariance Principles in Classical and Quantum Mechanics." American Journal of Physics 35 (1967): 254.

MLA (9th ed.) Citation

Chern, B., and A. Tubis. "Invariance Principles in Classical and Quantum Mechanics." American Journal of Physics, vol. 35, 1967, p. 254.