APA (7th ed.) Citation

An, Y., & Reigeluth, C. M. (2008). Problem-Based Learning in Online Environments.

Chicago Style (17th ed.) Citation

An, Yun-Jo, and Charles M. Reigeluth. Problem-Based Learning in Online Environments. 2008.

MLA (9th ed.) Citation

An, Yun-Jo, and Charles M. Reigeluth. Problem-Based Learning in Online Environments. 2008.

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