APA (7th ed.) Citation

Crawford, F. S. (1982). Hot chocolate effect. American Journal of Physics, 50, 398.

Chicago Style (17th ed.) Citation

Crawford, F. S. "Hot Chocolate Effect." American Journal of Physics 50 (1982): 398.

MLA (9th ed.) Citation

Crawford, F. S. "Hot Chocolate Effect." American Journal of Physics, vol. 50, 1982, p. 398.

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