Seidman, Lisa A., author
Prentice-Hall, 2000
Buku Teks
World Health Organization, 1991
Buku Teks
Seidman, Lisa A., author
Pearson Benjamin Cummings, 2008
Buku Teks
Estridge, Barbara H., author
Delmar Cengage Learning, 2012
Buku Teks
Sherman, Alan, author
Houghton Mifflin, 1976
Buku Teks