APA

Brogan H., . (2001). The Penguin history of the United States of America. Londres: Penguin Books.

Chicago

Brogan Hugh, . 2001. The Penguin history of the United States of America. Londres: Penguin Books.

Harvard

Brogan H., . (2001). The Penguin history of the United States of America. Londres: Penguin Books.

MLA

Brogan Hugh, . The Penguin history of the United States of America. Londres: Penguin Books. 2001.