Ploscowe, Morris
Hawthorn Books, 1955
Buku Teks
tranlated from the Russion by H. Chizhevsky
Progress Publishers, 1977
Buku Teks
Shacford, R.H.
Public Affairs Press, 1952
Buku Teks
Lumumba, Patrice
Foreign Languages Publishing Hose, 1961.
Buku Teks
Dixon, Patrick
Kingsway , 1994
Buku Teks