1. ^{{cite book | last = Simpson | first = Andrew | authorlink = | year = 2008 | title = Language and national identity in Africa | publisher =Oxford University Press | location = | isbn = 0-19-928675-2 | page = 74 | url = https://books.google.com/books?id=I7qsTVO4IK4C}}
2. ^{{cite book | last = Hutchinson | first = Sharon Elaine | authorlink = | year = 1996 | title = Nuer dilemmas: coping with money, war, and the state | publisher = University of California Press | location = | isbn = 0-520-20284-8 | page = 312 | url = https://books.google.com/books?id=WMFtmRKB6iYC}}