Black, E., Ferdig, R., & DiPietro, M. (2008). An Overview of Evaluative Instrumentation for Virtual High Schools. American Journal of Distance Education. https://doi.org/10.1080/08923640701713422
Black, Erik, Richard Ferdig, and Meredith DiPietro. 2008. “An Overview of Evaluative Instrumentation for Virtual High Schools”. American Journal of Distance Education. https://doi.org/10.1080/08923640701713422.
Black, E., R. Ferdig, and M. DiPietro. An Overview of Evaluative Instrumentation for Virtual High Schools. American Journal of Distance Education, 1 Jan. 2008, doi:10.1080/08923640701713422.