APA (7th ed.) Citation

Mayer, R. E. (2019). Thirty years of research on online learning. Applied cognitive psychology, 33(2), 152-159. https://doi.org/10.1002/acp.3482

Chicago Style (17th ed.) Citation

Mayer, Richard E. "Thirty Years of Research on Online Learning." Applied Cognitive Psychology 33, no. 2 (2019): 152-159. https://doi.org/10.1002/acp.3482.

MLA (9th ed.) Citation

Mayer, Richard E. "Thirty Years of Research on Online Learning." Applied Cognitive Psychology, vol. 33, no. 2, 2019, pp. 152-159, https://doi.org/10.1002/acp.3482.