Cagiltay, N. E. ., Cagiltay, K. ., & Celik, B. (2020). An Analysis of Course Characteristics, Learner Characteristics, and Certification Rates in MITx MOOCs. The International Review of Research in Open and Distributed Learning, 21(3), 121–139. https://doi.org/10.19173/irrodl.v21i3.4698