Oishi, Takahisa
The unknown Marx : reconstructing a unified perspective
Pluto Press , 2001
 Buku Teks
Plamenatz, John
German marxism and Russian communism
Longmans, Green, 1954
 Buku Teks
Plamenatz, John
What is communism? with an introd. by Stephen King-Hall / John Plamenatz
National News-Letter, 1949
 Buku Teks
Laski, Harold J.
Communist manifesto socialist landmark : A new appreciation written for the labour party
George Allen and Unwin, 1959
 Buku Teks
Sweezy, Paul M. (Paul Marlor), 1910-2004
Socialism
McGraw-Hill, 1949
 Buku Teks