Cosentino, Peter
Tiger Books International, 1993
Buku Teks
Cosentino, Peter
Pageone , 2003
Buku Referensi
Colbeck, John
Watson-Guptill Publications, 1969
Buku Teks
Triplett, Kathy, author
Lark Books, 1997
Buku Referensi
Speight, Charlotte F., author
McGraw-Hill, 2004
Buku Teks