Amin, Syaiful, and Sugiarto Sugiarto. “Penerapan Metode Pembelajaran Playing Card Slot Untuk Pembelajaran Sejarah Di SMA Negeri 12 Semarang”. Indonesian Journal of History Education 7, no. 2 (December 31, 2019): 129-134. Accessed October 21, 2020. https://journal.unnes.ac.id/sju/index.php/ijhe/article/view/35295.