Marberry, Sara O., 1959-, author
John Wiley & Sons, 1995
Buku Teks
edited by Roger Yee
Visual Reference Pub. Inc., 2003
Buku Teks
Rayfield, Julie K.
John Wiley & Sons, 1994
Buku Teks
Sawahata, Lesa, author
Rockport, 2001
Buku Teks
Geddes-Brown, Leslie, author
Page One Publishing, 2002
Buku Referensi