APA (7th ed.) Citation

Ortega y Gasset, J. (1973). An interpretation of universal history. Norton.

Chicago Style (17th ed.) Citation

Ortega y Gasset, Jose. An Interpretation of Universal History. New York: Norton, 1973.

MLA (9th ed.) Citation

Ortega y Gasset, Jose. An Interpretation of Universal History. Norton, 1973.