Marxist
To the Mensheviks, who were more moderate than the Bolsheviks.
Trotsky, Leon. История русской революции [History of the Russian Revolution]. Vol. 2, H. Atkinson, 1933.
Luxemburg, Rosa. "The Russian Revolution." The Russian Revolution and Leninism or Marxism? Trans. Bertram Wolfe. University of Michigan Press, 1961, ch. 6. Originally, Die russische Revolution [The Russian Revolution]. Paul Levi, 1922, ch. 6.
James, C.L.R. The Black Jacobins: Toussaint L'Ouverture and the San Domingo Revolution. Secker & Warburg, 1938, ch. 12.
Luxemburg, Rosa. "The Beginning." Die Rote Fahne [The Red Flag], 18 Nov. 1918.
Luxemburg, Rosa. "The Beginning." The Rosa Luxemburg Reader. New York University Press, 2004.
James, C.L.R. The Black Jacobins: Toussaint L'Ouverture and the San Domingo Revolution. Secker & Warburg, 1938, ch. 5.
Trotsky, Leon. "Their Morals and Ours." The New International, June 1938.
Trotsky, Leon. What Next? Vital Questions for the German Proletariat. Pioneer Publishers, 1932, ch. 14.
Lenin, Vladimir. "Our Foreign and Domestic Position and Party Tasks." The Moscow Gubernia Conference Of The R.C.P.(B.). 21 Nov. 1920, Moscow, Russia. Speech.
Lenin, Vladimir. Quoted in Communism, written by Mark Sandle. Routledge, 2014.
Lenin, Vladimir. Государство и революция [The State and Revolution]. Progress Publishers, 1917, ch. 5, sect. 4.
Lenin, Vladimir. "The State and Revolution." Essential Works of Lenin, edited by Henry M. Christman. Dover Publications, 1987, ch. 5, sect. 4.
Imperialism, the Highest Stage of Capitalism
Lenin, Vladimir. Империализм как высшая стадия капитализма [Imperialism, the Newest Stage of Capitalism]. Petrograd: Zhizn i Znaniye Publishers, 1917, pt. 7.
Lenin, Vladimir. "Imperialism, the Highest State of Capitalism." Essential Works of Lenin, edited by Henry M. Christman. Dover Publications, 1987, pt. 7.
Trotsky, Leon. Моя Жизнь [My Life]. Charles Scribner's Sons/Thornton Butterworth, 1930, ch. 40.
Žižek, Slavoj. "This Much I Know." Guardian, 10 Dec. 2016, www.theguardian.com/lifeandstyle/2016/dec/10/slavoj-zizek-we-are-all-basically-evil-egotistical-disgusting.
Trotsky, Leon. Литература и революция [Literature and Revolution]. Soviet Government, 1924.
Trotsky, Leon. Literature and Revolution, edited by William Keach. Haymarket Books, 2005.