Cita APA (7th ed.)

Beckwith, C., & Fisher, A. (1990). African ark: People and ancient cultures of Ethiopia and the Horn of Africa. Harry N. Abrams, Incorporated.

Cita Chicago (17th ed.)

Beckwith, Carol, i Angela Fisher. African Ark: People and Ancient Cultures of Ethiopia and the Horn of Africa. New York: Harry N. Abrams, Incorporated, 1990.

Cita MLA (9th ed.)

Beckwith, Carol, i Angela Fisher. African Ark: People and Ancient Cultures of Ethiopia and the Horn of Africa. Harry N. Abrams, Incorporated, 1990.