Cita APA (7a ed.)

Duffield, M. R. (1990). Sudan at the crossroads: From emergency preparedness to social security. Institute of Development Studies.

Cita Chicago Style (17a ed.)

Duffield, Mark R. Sudan at the Crossroads: From Emergency Preparedness to Social Security. Brighton: Institute of Development Studies, 1990.

Cita MLA (9a ed.)

Duffield, Mark R. Sudan at the Crossroads: From Emergency Preparedness to Social Security. Institute of Development Studies, 1990.