Vredenbregt, Jacob, redactor
Gramedia, 1985
Buku Teks
Baglione, Lisa A., author
Thomson Wadsworth, 2007
Buku Teks
Jackson, Patrick Thaddeus, 1972-, author
Routledge, 2016
Buku Teks
Lasswell, Harold D.
Routledge & Kegan Paul, 1952
Buku Teks
Riccucci, Norma M., author
Georgetown University Press, 2010
Buku Teks