Egan, John, 1952-, author
Sage Publications, 2015
Buku Teks
Robinson, Glen O., author
Thomson/West, 2008
Buku Teks
Loomis, Mary E.S., author
Prentice-Hall, 1983
Buku Teks
Stallings, William, author
Prentice-Hall, 1994
Buku Teks
Dumont, Raymond A., author
Little, Brown, 1985
Buku Teks