Ardahan, P. D. F., and Selçuk GÜLEÇ. “Developing and Doing Validity and Reliability of the Motivational Factors Scale of Recreational Motorcycle Usage”. ISPEC International Journal of Social Sciences & Humanities, vol. 4, no. 3, June 2020, pp. 129-44, doi:10.46291/ISPECIJSSHvol4iss3pp129-144.