Olga R. Kuharets, editor
[American Library association, American Library association], 2001
eBooks
Edited by Michele A. Paludi
Prentice-Hall, 2002
Buku Teks
Simpson, Paul, author
Routledge , 2004
Buku Teks
Hatim, Basil, author
Routledge, 2004
Buku Teks
Russell B Gunia
USA : ASM International, 1977
Buku Teks