APA (7th ed.) Citation

Hansen, S. H. (2009). Africa, the crescent of Islam. The borders of Islam, 111-113.

Chicago Style (17th ed.) Citation

Hansen, Stig Harle. "Africa, the Crescent of Islam." The Borders of Islam 2009: 111-113.

MLA (8th ed.) Citation

Hansen, Stig Harle. "Africa, the Crescent of Islam." The Borders of Islam, 2009, pp. 111-113.