Bury, Michael, author
Routledge, 2000
Buku Teks
Bury, Michael, author
Routledge , 1997
Buku Teks
Larkin, Mary, author
McGraw-Hill, 2011
Buku Teks
Spector, Rachel E., author
Appleton Century Crofts, 1985
Buku Teks
Porter-O`Grady, Tim, author
Mosby, 1998
Buku Teks