Kay, David A., author
Neb Cliffs Notes, 1994
Buku Teks
Larson, Ron, 1941-, author
D.C. Health, 1989
Buku Teks
Beecher, Judith A., author
Pearson - Addison Wesley, 2008
Buku Teks
Young, Cynthia Y., author
John Wiley & Sons, Inc, 2007
Buku Teks
Bruce, William J., author
Appleton-Century-Crofts, 1971
Buku Teks