O`Shea, Robert P. (Robert Paul), 1953-, author
Harcourt Brace Jovanovich, 1993
Buku Teks
edited by Thomas Clark ... [and others]
Writers digest Books, 1994
Buku Referensi
Grenville, Kate
Allen & Unwin, 1990
Buku Teks
Musson, Philip, author
Learning Matters, 2011
Buku Teks
Cox, Ailsa, author
Routledge, 2005
Buku Teks