Campbell, Lyle
Edinburgh University Press , 2013
Buku Teks
Young, Robert, 1950-
UK Malden, MA John Wiley & Sons, Inc., 2016
Buku Teks
Stott, Philip
Allen & Unwin, 1981
Buku Referensi
Losee, John
Oxford University Press, 1980
Buku Teks
Thody, Philip
Routledge , 1997
Buku Teks