- Author: Alexander De Waal
- Language: English
- Year: 2022
- Author: C. Eric Lincoln
- Language: English
- Year: 1994
- Author: Richard Priebe
- Language: English
- Year: 1988
- Author: Sharifa M. Zawawi
- Language: English
- Year: 1998
- Author: P. Khalil Saucier
- Language: English
- Year: 2011
- Author: Sharifa M. Zawawi
- Language: Kiswahili (Swahili), Englisj
- Year: 1991
- Author: Anthonia C Kalu
- Language: English
- Year: 2001
- Author: Yirga Gelaw Woldeyes
- Language: English
- Year: 2017
- Author: Abdul Rasheed Na'Allah
- Language: English, Yoruba, Fula (Fulfulde), Hausa
- Year: 2001
- Author: Kariamu Welsh-Asante
- Language: English
- Year: 1998