APA (7th ed.) Citation

Larkin, J. H., & Reif, F. (1977). Better instruction with lower costs. American Journal of Physics, 45, 138.

Chicago Style (17th ed.) Citation

Larkin, J. H., and F. Reif. "Better Instruction with Lower Costs." American Journal of Physics 45 (1977): 138.

MLA (9th ed.) Citation

Larkin, J. H., and F. Reif. "Better Instruction with Lower Costs." American Journal of Physics, vol. 45, 1977, p. 138.