Article · Journal · 2016
Harry Barton Essel, Patrick Osei-Poku, Akosua Tachie-Menson, Nana Afia Opoku-Asare
the Journal of Education and Practice, http://files. eric. ed. gov/fulltext/EJ1099557. pdf (diakses 25 September 2017)
as printed: HB Essel
as printed: P Osei-Poku
as printed: A Tachie-Menson
as printed: NA Opoku-Asare