Kiarie, Mary. "The Differential Effects of Peer Tutoring and Peer Tutoring with a Group Contingency on the Spelling Performance and Disruptive Behavior of Fouth-Grade Students in a General Education Classroom." Doctoral dissertation, Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1042554721Chicago Manual of Style (17th edition)