Marxist revolutionary
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.
Castro, Fidel. Discurso Pronunciado por El Comandante Fidel Castro Ruz, Primer Ministro De Gobierno Revolucionario [Speech on the Second Anniversary of the Triumph of the Revolution]. 2 Jan. 1961, Plaza de la Revolución, Havana, Cuba.
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.
Trotsky, Leon. Литература и революция [Literature and Revolution]. Soviet Government, 1924.
Trotsky, Leon. Literature and Revolution, edited by William Keach. Haymarket Books, 2005.