The Role of Teacher Immediacy as a Motivational Factor in Student Learning: Using Meta-Analysis to Test a Causal Model - Allen, Mike and Witt, Paul L. and Wheeless, Lawrence R. (Communication Education, 2006)
https://katalog.adlr.link/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA4MC8wMzYzNDUyMDUwMDM0MzM2OA