Clarckson, Geoffrey
Prentice-Hall, 1962
Buku Teks
Tyson, Lois, 1950-, author
Routledge, 2006
Buku Teks
edited by Jerome Meric, Isabelle Maque, Julienne Brabet
Emerald, 2016
eBooks
Kellner, Douglas
Oxford Polity Press 1989,
Buku Teks
Birch, David, 1950-
Macmillan, 1991
Buku Teks