Indria Nofitri, Syahrul Syahrul, Eliza Eliza, dan Hilma Pami Putri, “The Students’ Difficulties In Speaking English at Eleventh Grade Of PPTQ Muallimin Muhammadiyah Pakan Sinayan”, Al-afkar, vol. 2, no. 2, hlm. 287–297, Jul 2026.