APA (7th ed.) Citation

Herrmann, F., & Schmid, G. B. (1985). Momentum flow in the electromagnetic field. American Journal of Physics, 53, 415. https://doi.org/10.1119/1.14191

Chicago Style (17th ed.) Citation

Herrmann, F., and G. Bruno Schmid. "Momentum Flow in the Electromagnetic Field." American Journal of Physics 53 (1985): 415. https://doi.org/10.1119/1.14191.

MLA (9th ed.) Citation

Herrmann, F., and G. Bruno Schmid. "Momentum Flow in the Electromagnetic Field." American Journal of Physics, vol. 53, 1985, p. 415, https://doi.org/10.1119/1.14191.