Flora C.I. Chang,
Majalah, Jurnal, Buletin
University of Toronto Press, 2018
Majalah, Jurnal, Buletin
Mingst, Karen A., author
Norton & Company, 2014
Buku Teks
edited by James N. Rosenau
Free Press, 1961
Buku Teks
Center for Strategic Research (SAM), 1995
Majalah, Jurnal, Buletin