Weisman, Roanne, author
Health Communications, Inc, 2003
Buku Teks
Moline, Peg, author
Galvanized Brands, 2014
Buku Teks
Rosenfeld, Isadore, author
Random House, 1996
Buku Referensi
Pelletier, Kenneth R., author
A Fireside Book, 2002
Buku Teks
Goldstein, Mark A, author
Rodale, 2008
Buku Teks