Donnelly, Daniel, author
Rockport Publishers, 1998
Buku Referensi
edited by Janice M. Bell, Wendy L. Watson, Lorraine M. right
Family Nursing Unit Publishing, 1990
Buku Teks
Howard, John R., author
J.B. Lippincott, 1974
Buku Teks
Aitchison, Jim, author
Kantor Berita Radio 68H, 2007
Buku Teks
Gilpin, Alan, author
Cambridge University Press, 1996
Buku Teks