University of California Press, 1966
Buku Teks
Monga, Celestin, author
Lynne Rienner, 1996
Buku Teks
Esacove, Anne, author
Oxford University Press, 2016
eBooks
Mertz, Robert Anton
Westerview Press, 22 cm
Buku Teks
editor Peter de Haan and Yvonne van Hees
Netherlands Development Cooperation Information Department, 1996
Buku Teks