Kolker, Robert, author
Oxford University Press, 2000
Buku Teks
Levy, Emanuel
New York University Press, 1999
Buku Teks
Fuksiewicz, Jacek, author
Interpress, 1993
Buku Teks
Bowser, eileen, author
Macmillan Library reference USA, 1990
Buku Referensi
Mccomb, Gordon, author
Mc Graw-Hill , 2011
Buku Teks