Daniel Moran and James A. Russell, editors.
Georgetown University Press, 2016
Buku Teks
Levitan, Sar A.
Harper & Row, 1982
Buku Teks
Kopsakangas-Savolainen, Maria
Springer, 2012
eBooks
Dave Ulrich
McGraw Hil Education, 2009
Buku Teks
Torres-Coronas, Teresa
Idea Group Publishing, 2005
Buku Teks