Cita APA (7a ed.)

Negus, A. L. (1998). The fall of the Old Kingdom: A great African drought? University Microfilms International.

Cita Chicago Style (17a ed.)

Negus, Anne Lynne. The Fall of the Old Kingdom: A Great African Drought? Ann Arbor: University Microfilms International, 1998.

Cita MLA (9a ed.)

Negus, Anne Lynne. The Fall of the Old Kingdom: A Great African Drought? University Microfilms International, 1998.