"Andrew F. Walls". Aberdeen Methodist Church. Retrieved 19 August 2021.
acighana.org
"Academic Staff". acighana.org. Akrofi-Christaller Institute of Theology, Mission and Culture. Archived from the original on 30 May 2016. Retrieved 13 May 2016.
"Academic Staff". acighana.org. Akrofi-Christaller Institute of Theology, Mission and Culture. Archived from the original on 30 May 2016. Retrieved 13 May 2016.