Tammy L. Bess, Robert J. Harvey: Bimodal Score Distributions and the Myers-Briggs Type Indicator: Fact or Artifact? In: Journal of Personality Assessment. Band78, Nr.1, Februar 2002, ISSN0022-3891, S.176–186, doi:10.1207/s15327752jpa7801_11 (tandfonline.com [abgerufen am 12. November 2018]).
Jens B. Asendorpf: Head-to-head comparison of the predictive validity of personality types and dimensions. In: European Journal of Personality. Band17, Nr.5, 2003, ISSN0890-2070, S.327–346, doi:10.1002/per.492 (wiley.com [abgerufen am 12. November 2018]).
David J Pittenger: The limitations of extracting typologies from trait measures of personality. In: Personality and Individual Differences. Band37, Nr.4, September 2004, ISSN0191-8869, S.779–787, doi:10.1016/j.paid.2003.10.006 (elsevier.com [abgerufen am 12. November 2018]).
Robert R. McCrae, Antonio Terracciano, Paul T. Costa, Daniel J. Ozer: Person-factors in the California Adult Q-Set: closing the door on personality trait types? In: European Journal of Personality. Band20, Nr.1, Januar 2006, ISSN0890-2070, S.29–44, doi:10.1002/per.553 (wiley.com [abgerufen am 12. November 2018]).
Joshua N. Hook, Todd W. Hall, Don E. Davis, Daryl R. Van Tongeren, Mackenzie Conner: The Enneagram: A systematic review of the literature and directions for future research. In: Journal of Clinical Psychology. 77. Jahrgang, Nr.4, 17. Dezember 2020, S.865–883, doi:10.1002/jclp.23097 (englisch, wiley.com [abgerufen am 30. Oktober 2023]).
David J Pittenger: The limitations of extracting typologies from trait measures of personality. In: Personality and Individual Differences. Band37, Nr.4, September 2004, ISSN0191-8869, S.779–787, doi:10.1016/j.paid.2003.10.006 (elsevier.com [abgerufen am 12. November 2018]).
Oliver P. John, Laura P. Naumann, Christopher J. Soto: Paradigm Shift to the Integrative Big Five Trait Taxonomy. In: Oliver P. John, Richard W. Robins, Lawrence A. Pervin (Hrsg.): Handbook of Personality: Theory and Research. 3. Auflage. Guilford Press, 2008, ISBN 978-1-60623-738-0, S.114–117 (google.de [abgerufen am 22. Mai 2018]).
jstor.org
Ken Randall, Mary Isaacson, Carrie Ciro: Validity and Reliability of the Myers-Briggs Personality Type Indicator. In: Journal of Best Practices in Health Professions Diversity. 10. Jahrgang, Nr.1, 2017, S.1–27, JSTOR:26554264 (englisch).
Tammy L. Bess, Robert J. Harvey: Bimodal Score Distributions and the Myers-Briggs Type Indicator: Fact or Artifact? In: Journal of Personality Assessment. Band78, Nr.1, Februar 2002, ISSN0022-3891, S.176–186, doi:10.1207/s15327752jpa7801_11 (tandfonline.com [abgerufen am 12. November 2018]).
wikipedia.org
en.wikipedia.org
Joshua N. Hook, Todd W. Hall, Don E. Davis, Daryl R. Van Tongeren, Mackenzie Conner: The Enneagram: A systematic review of the literature and directions for future research. In: Journal of Clinical Psychology. 77. Jahrgang, Nr.4, 17. Dezember 2020, S.865–883, doi:10.1002/jclp.23097 (englisch, wiley.com [abgerufen am 30. Oktober 2023]).
wiley.com
onlinelibrary.wiley.com
Jens B. Asendorpf: Head-to-head comparison of the predictive validity of personality types and dimensions. In: European Journal of Personality. Band17, Nr.5, 2003, ISSN0890-2070, S.327–346, doi:10.1002/per.492 (wiley.com [abgerufen am 12. November 2018]).
Robert R. McCrae, Antonio Terracciano, Paul T. Costa, Daniel J. Ozer: Person-factors in the California Adult Q-Set: closing the door on personality trait types? In: European Journal of Personality. Band20, Nr.1, Januar 2006, ISSN0890-2070, S.29–44, doi:10.1002/per.553 (wiley.com [abgerufen am 12. November 2018]).
Joshua N. Hook, Todd W. Hall, Don E. Davis, Daryl R. Van Tongeren, Mackenzie Conner: The Enneagram: A systematic review of the literature and directions for future research. In: Journal of Clinical Psychology. 77. Jahrgang, Nr.4, 17. Dezember 2020, S.865–883, doi:10.1002/jclp.23097 (englisch, wiley.com [abgerufen am 30. Oktober 2023]).
zdb-katalog.de
Tammy L. Bess, Robert J. Harvey: Bimodal Score Distributions and the Myers-Briggs Type Indicator: Fact or Artifact? In: Journal of Personality Assessment. Band78, Nr.1, Februar 2002, ISSN0022-3891, S.176–186, doi:10.1207/s15327752jpa7801_11 (tandfonline.com [abgerufen am 12. November 2018]).
Jens B. Asendorpf: Head-to-head comparison of the predictive validity of personality types and dimensions. In: European Journal of Personality. Band17, Nr.5, 2003, ISSN0890-2070, S.327–346, doi:10.1002/per.492 (wiley.com [abgerufen am 12. November 2018]).
David J Pittenger: The limitations of extracting typologies from trait measures of personality. In: Personality and Individual Differences. Band37, Nr.4, September 2004, ISSN0191-8869, S.779–787, doi:10.1016/j.paid.2003.10.006 (elsevier.com [abgerufen am 12. November 2018]).
Robert R. McCrae, Antonio Terracciano, Paul T. Costa, Daniel J. Ozer: Person-factors in the California Adult Q-Set: closing the door on personality trait types? In: European Journal of Personality. Band20, Nr.1, Januar 2006, ISSN0890-2070, S.29–44, doi:10.1002/per.553 (wiley.com [abgerufen am 12. November 2018]).