APA

United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134, . (1978). Highway Maintenance and Rehabilitation. Pan-African Conference 2.Accra, 1977. Addis Abeba: United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134.

Chicago

United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134, . 1978. Highway Maintenance and Rehabilitation. Pan-African Conference 2.Accra, 1977. Addis Abeba: United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134.

Harvard

United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134, . (1978). Highway Maintenance and Rehabilitation. Pan-African Conference 2.Accra, 1977. Addis Abeba: United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134.

MLA

United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134, . Highway Maintenance and Rehabilitation. Pan-African Conference 2.Accra, 1977. Addis Abeba: United Nations Economic and Social Council. Economic Commission for Africa. E/CN.14/TRANS/134. 1978.