Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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