Karl Marx (1818-1883) Father of modern Communism.
German political, social and economic theorist.
From a photograph .. Photography. Britannica ImageQuest, Encyclopædia Britannica, 25 May 2016.
quest.eb.com/search/300_2283072/1/300_2283072/cite. Accessed 22 Jan 2021.
Stalin the Great - Luminary of Communism!
(Poster). Fine Art. Britannica ImageQuest, Encyclopædia Britannica, 25 May 2016.
quest.eb.com/search/525_2906164/1/525_2906164/cite. Accessed 22 Jan 2021.
Victims of Communism Memorial - dedicated June 12 at the corner of New Jersey Ave. and Massachusetts Ave., in Washington, D.C.
Photography. Britannica ImageQuest, Encyclopædia Britannica, 25 May 2016.
quest.eb.com/search/142_2306012/1/142_2306012/cite. Accessed 22 Jan 2021.
Communism
Encyclopædia Britannica, 6 Nov. 2020.
Karl Marx
Encyclopædia Britannica, 17 Jan. 2020.
Communism
St. James Encyclopedia of Popular Culture Online, Gale, 2013.
How Stuff Works: How Socialism, Communism, Fascism and Nazism Work
Marshall Brain, 2009
Comparing governments: democracy vs.
authoritarianism
Comparing economic systems: capitalism,
communism and socialism
Communism by 
Communism by 
The Britannica Guide to Political and Social Movements That Changed the Modern World by 
Understanding the Communist Manifesto by