Hayden, Torey L., author
Qanita, 2004
Buku Teks
Myron, Vicki, author
Grand Central Publishing, 2008
Buku Teks
Siregar, Merari, author
Balai Pustaka, 1992
Buku Teks
Dicamillo, Kate, author
Gramedia, 2005
Buku Teks
Gibb, Camilla, author
Qanita, 2008
Buku Teks