Couloumbis, Theodore A.
Prentice-Hall, 1990
Buku Teks SO
edited by Pinar Bilgin and L.H.M. Ling
Routledge, Taylor & Francis Group, 2017
Buku Teks SO
Curtin, Patricia Ann, 1955-
Sage, 2007
Buku Teks SO
Nau, Henry R., 1941-
Sage, 2019
Buku Teks SO
Claude, Inis L.
Random House, 1976
Buku Teks SO