Cita APA

Nelson, H. D. (1983). Sudan, a country study (3. edition.). Washington: United States Government, Secretary of the Army.

Citación estilo Chicago

Nelson, Harold D. Sudan, a Country Study. 3. edition. Washington: United States Government, Secretary of the Army, 1983.

Cita MLA

Nelson, Harold D. Sudan, a Country Study. 3. edition. Washington: United States Government, Secretary of the Army, 1983.