1. ^{{Cite book|url=https://books.google.com.ng/books?id=5GcnAQAAIAAJ&q=Afaha+Akpan+Ekpo&dq=Afaha+Akpan+Ekpo|title=African Christianity: A Case Study of the History of the Brotherhood of the Cross and Star|last=Nkereuwem|first=Umo Effiong|date=1984|publisher=Brotherhood Press|language=en}}
2. ^{{Cite book|url=https://books.google.com.ng/books?id=SDKlJQBZ92IC&q=Afaha+Akpan+Ekpo|title=National Gazetteer of Place Names: Cross River State|date=1985|publisher=National Population Bureau, Demographic Division|language=en}}
3. ^{{Cite book|url=https://books.google.com.ng/books?id=zKsuAQAAIAAJ&q=Afaha+Akpan+Ekpo|title=Population Census of Nigeria, 1963: Northern Region: Eastern Region. 2 pts|last=Office|first=Nigeria Federal Census|language=en}}