APA (7th ed.) Citation

León Vélez, M. V., & Vanegas, M. B. The United States as a melting pot in world history.

Chicago Style (17th ed.) Citation

León Vélez, María Verónica, and María Bernardita Vanegas. The United States as a Melting Pot in World History.

MLA (8th ed.) Citation

León Vélez, María Verónica, and María Bernardita Vanegas. The United States as a Melting Pot in World History.

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