Trapeznikov, S. P. (1972). At the turning points of history: Some lessons of the struggle against revisionism within the Marxist-Leninist movement. Progress Publishers.

Trapeznikov, S. P. At the Turning Points of History: Some Lessons of the Struggle Against Revisionism Within the Marxist-Leninist Movement. Moscow: Progress Publishers, 1972.

Trapeznikov, S. P. At the Turning Points of History: Some Lessons of the Struggle Against Revisionism Within the Marxist-Leninist Movement. Progress Publishers, 1972.