एपीए उद्धरण

Bryn O'Callaghan. (1999). An illustrated history of the USA. Essex, UK: Longman.

शिकागो स्टाइल उद्धरण

Bryn O'Callaghan. An Illustrated History of the USA. Essex, UK: Longman, 1999.

एमएलए उद्धरण

Bryn O'Callaghan. An Illustrated History of the USA. Essex, UK: Longman, 1999.