Coty, Erma, author
Prentice-Hall, 2000
Buku Teks
Spry, Cynthia, author
Jones and Bartlett, 2009
Buku Teks
Ellis, Janice Rider, author
J.B. Lippincott, 2007
Buku Teks
Murray, Ruth Beckmann, author
Prentice-Hall, 1985
Buku Teks
Bradley, Jean C., author
Appleton-Century-Crofts, 1982
Buku Teks