Cita APA (7th ed.)
Cronin, A. J. (1941). The citadel and the keys of the kingdom. Little,Brown.
Cita Chicago (17th ed.)
Cronin, A J. The Citadel and the Keys of the Kingdom. Boston: Little,Brown, 1941.
Cita MLA (9th ed.)
Cronin, A J. The Citadel and the Keys of the Kingdom. Little,Brown, 1941.
Atenció: Aquestes cites poden no estar 100% correctes.