Kozlov, Nicholas N.; Weitz, Eric D. (1989). "Reflections on the Origins of the 'Third Period': Bukharin, the Comintern, and the Political Economy of Weimar Germany". Journal of Contemporary History. 24 (3): 387–410. doi:10.1177/002200948902400301. JSTOR260667. S2CID144906375.
Kozlov, Nicholas N.; Weitz, Eric D. (1989). "Reflections on the Origins of the 'Third Period': Bukharin, the Comintern, and the Political Economy of Weimar Germany". Journal of Contemporary History. 24 (3): 387–410. doi:10.1177/002200948902400301. JSTOR260667. S2CID144906375.
David R. Corkill, "The Chilean Socialist Party and The Popular Front 1933-41." Journal of Contemporary History 11.2 (1976): 261-273. in JSTOR; John R. Stevenson, The Chilean Popular Front (University of Pennsylvania Press, 1942).
Fourth Congress of the Communist International (1922). "Theses on Comintern Tactics". Archived from the original on 9 February 2008. Retrieved 20 February 2008.
Kozlov, Nicholas N.; Weitz, Eric D. (1989). "Reflections on the Origins of the 'Third Period': Bukharin, the Comintern, and the Political Economy of Weimar Germany". Journal of Contemporary History. 24 (3): 387–410. doi:10.1177/002200948902400301. JSTOR260667. S2CID144906375.
Fourth Congress of the Communist International (1922). "Theses on Comintern Tactics". Archived from the original on 9 February 2008. Retrieved 20 February 2008.
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Draper, Theodore (2003). American Communism and Soviet Russia (2nd ed.). New Brunswick, N.J.: Transaction Publishers. p. 172. ISBN9780765805317. OCLC51505513.
