[Coxon, M. (1935). The door opens. Appleton.
Cita Chicago (17th ed.)[Coxon, Mauriel]. The Door Opens. New York: Appleton, 1935.
Cita MLA (9th ed.)[Coxon, Mauriel]. The Door Opens. Appleton, 1935.
Atenció: Aquestes cites poden no estar 100% correctes.