Ellen Wartella, D. Charles Whitnet, editors
Sage, 1983
Buku Referensi
Arvind Kumar, editor-in-chief
Anmol Publications, 1998
Buku Referensi
Buku Teks
Vivian, John, author
Pearson and AB, 2007
Buku Teks
Schramm, Wilbur, author
American Hospital Association, 1974
Buku Teks