Dorf, Richard C.
Prentice-Hall, 1994
Buku Referensi
[research, writing, and illustrations, Charlie Wing ; editor Benjamin W. Allen]
Meredith Corporation, 1997
Buku Referensi
Crouse, William H., author
McGraw-Hill, 1980
Buku Teks
Better Homes and Gardens Books, 1997
Buku Teks
Chastain, Larry, author
Pearson Prentice Hall, 2004
Buku Teks