Nofrianti, Yona, and Hasbullah Malau. “Supporting Factors and Barriers in Improving the Quality of the Passport Services at the Agam Class I Non-TPI Immigration Office”. TOFEDU: The Future of Education Journal 4, no. 6 (July 6, 2025): 2212–2221. Accessed August 27, 2025. https://journal.tofedu.or.id/index.php/journal/article/view/790.