Cita APA (7th ed.)
Brogan, H. The Penguin History of the United States of America. Penguin.
Cita Chicago (17th ed.)
Brogan, Hugh. The Penguin History of the United States of America. Nueva York, EUA: Penguin.
Cita MLA (9th ed.)
Brogan, Hugh. The Penguin History of the United States of America. Penguin.
Atenció: Aquestes cites poden no estar 100% correctes.