Cita APA (7th ed.)
Elton, G. R. The practice of history. Thomas Y. Crowell : Apollo.
Cita Chicago (17th ed.)
Elton, Geoffrey Rudolph. The Practice of History. Nueva York, EUA: Thomas Y. Crowell : Apollo.
Cita MLA (9th ed.)
Elton, Geoffrey Rudolph. The Practice of History. Thomas Y. Crowell : Apollo.
Atenció: Aquestes cites poden no estar 100% correctes.