Wood, A.W.
Informal education and development in Africa / A.W. Wood
Mouton, 1974
 Buku Teks
Subregional seminar on teacher training in environmental education for Asia, 15-22 November 1987
UPM- UNESCO-UNEP International Environmental Education Programme , 1987
 Buku Teks
Busia,K.A
The challenge of Africa / K. A. Busia
United States of America, 1962
 Buku Teks
Thomas, Howard
Africa: the future of management education, volume 2
Emerald, 2017
 eBooks
Murdock, George Peter
Africa
McGraw-Hill, 1959
 Buku Teks