Piddington, Ralph, author
Eidenburgh Oliver , 1960
Buku Teks
Lienhardt, Godfrey, author
Oxford University Press, 1969
Buku Teks
Evans-Pritchard, E.E. (Edward Evan), 1902-1973, author
Bumi Aksara, 1986
Buku Teks
Evans-Pritchard, E.E. (Edward Evan), 1902-1973, author
Routledge, 1972
Buku Teks
Nadel, S.F. (Siegfried Frederick), author
The Free Press of Glencoe, 1964
Buku Teks