Igbozurike, Martin
Scandinavian Institute of African Studies, 1976
Buku Teks SO
edited by Peter Worsley
Manchester University Press, 1971
Buku Teks SO
edited by Arsenio M. Balisacan and Nobuhiko Fuwa
Institute of Southeast Asian Studies, 2007
Buku Teks SO
United Nations Development Programme, 1980
Buku Teks SO
Selo Soemardjan
Sebelas Maret University Press in cooperation with Yayasan Ilmu-Ilmu Social, Jakarta, and East-West Center, Honolulu, 1993
Buku Teks SO