Purba, B., N. Hasibuan, and P. Ramadhani. “Pemanfaatan Google Form Sebagai Media Ujian Online Pada SMKS Prayatna 1 Medan”. Journal of Social Responsibility Projects by Higher Education Forum, Vol. 2, no. 1, July 2021, pp. 49-53, https://ejurnal.seminar-id.com/index.php/jrespro/article/view/864.