RITONGA, Abdul Kadir; MUKHADIS, Amat; HADI, Syamsul; HANDARINI, Dany M. Effects of Cooperative Learning Method Type Stad, Language Aptitude, and Intelligence on the Achievement English Hotel at Medan Tourism Academy. International Journal of Social Sciences & Educational Studies, [S. l.], v. 3, n. 2, p. 128–139, 2016. Disponível em: https://ijsses.tiu.edu.iq/index.php/ijsses/article/view/578. Acesso em: 1 may. 2026.