APA (7th ed.) Citation

Trotsky, L., & Evans, L. The Spanish revolution (1931-1939). Pathfinder press (New York).

Chicago Style (17th ed.) Citation

Trotsky, Léon, and Les Evans. The Spanish Revolution (1931-1939). Pathfinder press (New York).

MLA (8th ed.) Citation

Trotsky, Léon, and Les Evans. The Spanish Revolution (1931-1939). Pathfinder press (New York).

Warning: These citations may not always be 100% accurate.