APA (7th ed.) Citation

Hoffmann, B. (1977). Unexpected rewards. American Journal of Physics, 45, 787.

Chicago Style (17th ed.) Citation

Hoffmann, B. "Unexpected Rewards." American Journal of Physics 45 (1977): 787.

MLA (9th ed.) Citation

Hoffmann, B. "Unexpected Rewards." American Journal of Physics, vol. 45, 1977, p. 787.