Sobo, Elisa J., author
Routledge, 2016
Buku Teks
Lopreato, Joseph, author
Allen & Unwin , 1984
Buku Teks
Whitaker, Elizabeth Dixon, 1962-, author
Routledge, 2017
Buku Teks
Butzer, Karl W., author
Cambridge University Press, 1982
Buku Teks
Bavikatte, Sanjay Kabir
Oxford University Press, 2014
Buku Teks