Coppock, Vicki, author
SAGE, 2010
Buku Teks
edited by Bruce A. Thyer and John S. Wodarski
John Wiley, 2007
Buku Teks
Neal, Margo C., author
Nurseco, 1981
Buku Teks
Austad, Carol Shaw
Jossey-Bass Publishers, 1996
Buku Teks
Mike Luck, Rob Pocock, Mike Tricker, editor
Routledge, 2000
Buku Teks