Engdahl, David A., author
Chilton Books, 1967
Buku Teks
Whelan, Bride M., author
Rockport Publisher, 1994
Buku Teks
Whelan, Bride M., author
Rockport Publisher, 2005
Buku Teks
Itten, Johannes, author
Reinhold, [1961]
Buku Teks
White, Gary M., 1961-, author
Mosby, 2004
Buku Referensi