Levy, Michael, 1950-, author
Cambridge University Press, 2016
Buku Teks
R.R. Bowker Company, 1986
Buku Referensi
R.R. Bowker Company, 1986
Buku Referensi
Geldard, Kathyrn, author
Sage, 2002
Buku Teks
Hunt, Peter, 1945-, author
Oxford University Press, 1994
Buku Teks