APA (7th ed.) Citation

Fleming, J. H., & Asplund, J. (2007). Human sigma. Gallup Press Publishers.

Chicago Style (17th ed.) Citation

Fleming, John H., and Jim Asplund. Human Sigma. New York: Gallup Press Publishers, 2007.

MLA (9th ed.) Citation

Fleming, John H., and Jim Asplund. Human Sigma. Gallup Press Publishers, 2007.