Kardelj, Edvard, author
Tarawang Press, 2001
Buku Teks
Rauschning, Hermann
ThorntonButterworth Ltd, 1940
Buku Teks
Bracher, Karl Dietrich, 1922
Washington Praeger , 1970
Buku Teks
Eisler, Gerbart, author
International Publishers, 1945
Buku Teks
London: Tiger Books International, 1994,
Buku Referensi