Miller, W. Wade, Larry D. Trede, Victor A. Bekkum, and Joe E. Muller. 1989. “The Effect of Teaching Techniques and Student Characteristics on Micocomputer Instruction in Agricultural Mechanization”. Journal of Agricultural Systems, Technology, and Management 4 (2):13-17. https://jastm.org/index.php/jastm/article/view/11921.