Toby Israel, author
John Wiley & Sons, 2003
Buku Teks
Iovine, julie, author
Chronicle Books, 2002
Buku Teks
Kopec, David Alan, author
Fairchild Books, 2012
Buku Teks
Augustin, Sally, author
John & Sons, Inc, 2009
Buku Teks
Cambridge University Press , 1994
Buku Teks