Nadel, S.F. (Siegfried Frederick), author
Cohen & West, 1969
Buku Teks
Mair, Lucy, author
University of London, 1969
Buku Teks
Piddington, Ralph, author
Eidenburgh Oliver , 1960
Buku Teks
edited by Edwin Ardener
Tavistock , 1971
Buku Teks
Beattie, John, author
The Free Press, 1964
Buku Teks