APA (7th ed.) Citation

Murphy, G., & Dale, L. A. (1961). Challenge of psychical research: A primer of parapsychology. Harpers.

Chicago Style (17th ed.) Citation

Murphy, Gardner, and Laura A. Dale. Challenge of Psychical Research: A Primer of Parapsychology. New York: Harpers, 1961.

MLA (8th ed.) Citation

Murphy, Gardner, and Laura A. Dale. Challenge of Psychical Research: A Primer of Parapsychology. Harpers, 1961.

Warning: These citations may not always be 100% accurate.