APA (7th ed.) Citation

Engel, U., & Olsen, G. R. (2005). The African exception. Ashgate.

Chicago Style (17th ed.) Citation

Engel, Ulf, and Gorm Rye Olsen. The African Exception. Aldershot, Hants, England ; Burlington, VT: Ashgate, 2005.

MLA (9th ed.) Citation

Engel, Ulf, and Gorm Rye Olsen. The African Exception. Ashgate, 2005.