Pavlik, Cheryl
[publisher not identified], [date of publication not identified]
Buku Teks
Firmanzah, author
Salemba Empat, 2009
Buku Teks
Ranney, David, author
Temple University Press, 2003
Buku Teks
Artikel Jurnal
Eko Prasojo, author
Departement of Administration Sciences, Faculty of Social and Political Sciences,Universitas Indonesia, 2012
Artikel Jurnal