Bulajic, Milan, author
Martinus Nijhoff, 1993
Buku Teks
edited by M.A. Bienefeld and Martin Godfrey
John Wiley & Sons, 1982
Buku Teks
Gordon, Lincoln
McGraw-Hill c., 1979
Buku Teks
Williams, Marc
Harvester Wheatsheaf , 1994
Buku Teks
Myrdal, Gunnar, 1898-, author
Yale University Press , 1960
Buku Teks