Cita APA (7a ed.)

Murphy, G., & Dale, L. A. (1970). Challenge of psychical research: A primer of parapsychology.

Cita Chicago Style (17a ed.)

Murphy, Gardner, y Laura A. Dale. Challenge of Psychical Research: A Primer of Parapsychology. New York, N.Y, 1970.

Cita MLA (9a ed.)

Murphy, Gardner, y Laura A. Dale. Challenge of Psychical Research: A Primer of Parapsychology. 1970.