Hunt, Peter, 1945-, author
Oxford University Press, 1994
Buku Teks
Levy, Michael, 1950-, author
Cambridge University Press, 2016
Buku Teks
Norton, Donna E., author
Merril; A Bell and Howell Information, 1987
Buku Teks
edited by Louis G. Locke, William M. Gibson, George Arms
Holt, Rinehart and Winston, 1959
Buku Teks
London Routledge , 1992
Buku Teks