Trees, A R.(2007). The learning environment in clicker classrooms: Student processes of learning and involvement in large university‐level courses using student response systems. Learning, Media and Technology, 32(1), 21-40. doi:10.1080/17439880601141179

Trees, April R. "The Learning Environment in Clicker Classrooms: Student Processes of Learning and Involvement in Large University‐level Courses Using Student Response Systems". Learning, Media and Technology, 32.1 ( 2007 ): 21-40.