Balander, Georges
Penguin Books, 1970
Buku Teks
Mair, Lucy, author
University of London, 1969
Buku Teks
Cochrane, Glynn, author
Oxford University Press, 1971
Buku Teks
Bohannan, Paul, author
Holt, Rinehart and Winston, 1963
Buku Teks
edited by James Midgley, Manohar Pawar
Palgrave Macmillan, 2017
Buku Teks