Syafe'i, Akhmad (2017) THE EFFECTIVENESS OF QUANTUM LEARNING METHOD IN REDUCING STUDENTS' SPEAKING ANXIETY. Skripsi thesis, Universitas Mercu Buana Yogyakarta.

Syafe'i, Akhmad (2017) QUANTUM LEARNING METHOD: A STRATEGY IN REDUCING STUDENTS' SPEAKING ANXIETY. Naskah Publikasi Prodi Bahasa Inggris.