Cita APA (7th ed.)
Freud, S., & Rieff, P. Studies in Parapsychology. Collier.
Cita Chicago (17th ed.)
Freud, Sigmund, i Philip Rieff. Studies in Parapsychology. Nueva York, EUA: Collier.
Cita MLA (9th ed.)
Freud, Sigmund, i Philip Rieff. Studies in Parapsychology. Collier.
Atenció: Aquestes cites poden no estar 100% correctes.