Cita APA (7th ed.)

Drower, M. S., & Sorrell, A. (1970). Nubia: A drowning land. Longmans.

Cita Chicago (17th ed.)

Drower, Margaret S., i Alan Sorrell. Nubia: A Drowning Land. [Harlow]: Longmans, 1970.

Cita MLA (8th ed.)

Drower, Margaret S., i Alan Sorrell. Nubia: A Drowning Land. Longmans, 1970.