Yahuda, Michael
Routledge, 1996
Buku Teks SO
edited by Nikolaos Tzifakis
Springer, 2012
eBooks
Holsti, Kalevi J.
Cambridge University Press, 2004
Buku Teks SO
Chandra, Prakash
Vikas Publishing House, 1982
Buku Teks
Chandra, Prakash
Vikas Publishing House, 1982
Buku Teks