APA (7th ed.) Citation

USO 20 aǫs de historia sindical. [Madrid] : USO, 1978.

Chicago Style (17th ed.) Citation

USO 20 aǫs De Historia Sindical. [Madrid] : USO, 1978.

MLA (8th ed.) Citation

USO 20 aǫs De Historia Sindical. [Madrid] : USO, 1978.

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