APA (7th ed.) Citation

Trotsky, L. (1975). The challenge of the Left opposition. Pathfinder Press.

Chicago Style (17th ed.) Citation

Trotsky, Leon. The Challenge of the Left Opposition. New York: Pathfinder Press, 1975.

MLA (8th ed.) Citation

Trotsky, Leon. The Challenge of the Left Opposition. Pathfinder Press, 1975.