Schubert, Glendon, author
Boston University Press, 1970
Buku Teks
edited by I. William Zartman and William Mark Habeeb
Westerview Press, 1993
Buku Teks
Riggs, Fred W., author
East-West Center Press , 1967
Buku Teks
Ladd, Carll Everett
W.W. Norton , 1987
Buku Teks
Bekkers, Victor, author
Routledge, 2015
Buku Teks