* EtymologyOnLine (word history)* Robinson, David "Muslim Societies in African History" (The Press Syndicate of the University of Cambridge Cambridge, UK 2004) ISBN 0-521-53366-X
* EtymologyOnLine (word history)*Robinson, David "Muslim Societies in African History" (The Press Syndicate of the University of Cambridge Cambridge, UK 2004) ISBN 0-521-53366-X==External links==