Ayres, R. M. (1931). The princess passes. Hodder and Stoughton.
Cita Chicago (17th ed.)Ayres, Ruby M. The Princess Passes. London: Hodder and Stoughton, 1931.
Cita MLA (8th ed.)Ayres, Ruby M. The Princess Passes. Hodder and Stoughton, 1931.
Atenció: Aquestes cites poden no estar 100% correctes.