Cita APA (7a 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 Style (17a ed.)

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

Cita MLA (9a ed.)

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