Haddix, Kathryn A., author
Glencoe, McGraw-Hill, 2002
Buku Teks
McGraw-Hill Co., 2002
Multimedia
Haddix, Kathryn A., author
McGraw-Hill, 2001
Multimedia
Olsen, June L.
Prentice-Hall, 1995
Buku Teks
Olsen, June L., author
Printice-Hall Health, 2000
Buku Teks