Roberson, Ronald G. "The Ethiopian Catholic Church". Eastern Catholic Churches. Catholic Near East Welfare Association. p. 2. Retrieved 24 January 2012.
Roberson, Ronald G. "The Eastern Catholic Churches 2010"(PDF). Eastern Catholic Churches Statistics. Catholic Near East Welfare Association. Archived from the original(PDF) on 23 September 2015. Retrieved 28 December 2011.
Roberson, Ronald G. "The Ethiopian Catholic Church". Eastern Catholic Churches. Catholic Near East Welfare Association. p. 1. Retrieved 24 January 2012.
Roberson, Ronald G. "The Eastern Catholic Churches 2010"(PDF). Eastern Catholic Churches Statistics. Catholic Near East Welfare Association. Archived from the original(PDF) on 23 September 2015. Retrieved 28 December 2011.