Kardelj, Edvard
Jugoslavia Beograd, 1962
Buku Teks
Welch, Joseph N.
Houghton Miffiln, 1956
Buku Teks
Office for Official Publications of the European Communities, 2003
Buku Teks
Valesia Ananta
2017
UI - Makalah dan Kertas Kerja
Rothstein, Andrew
Penguin Books , 1950
Buku Teks