Orczy, E. O. (1920). The first Sir Percy: An adventure of the laughing cavalier. Hodder & Stoughton.
Cita Chicago (17th ed.)Orczy, Emmuska Orczy. The First Sir Percy: An Adventure of the Laughing Cavalier. London: Hodder & Stoughton, 1920.
Cita MLA (8th ed.)Orczy, Emmuska Orczy. The First Sir Percy: An Adventure of the Laughing Cavalier. Hodder & Stoughton, 1920.
Atenció: Aquestes cites poden no estar 100% correctes.