دلاور،ع.(1374). مقدمهای بر نظریههای اندازه گیری (روانسنجی). تهران: انتشارات سمت.
سیاسی،ع.ا.(1371). نظریههای شخصیت یا مکاتب روانشناسی.تهران:انتشارات دانشگاه تهران.
شاملو،س.(1363).مکتبها و نظریهها در روانشناسی شخصیت. تهران: انتشارات چهر.
کریمی،ی.(1374). روانشناسی شخصیت. تهران: نشر ویرایش.
راس. آ.اُ.(1373). روانشناسی شخصیت، نظریهها و فرآیندها. (ترجمه سیاوش جمالفر). تهران: بعثت.(انتشار کتاب به زبان اصلی،1992).
Adams,S.H.(1994).Role of hostility in women's health during midlife. A longitudinal study. Health psychologys.13, 488-495
Apostal, R.A.(1991). College students' career interests and sensing-intuition. personality. Journal of College Student Development.32, 4-7.
Bast,M. & Thomson,C.( 2005).Out of the box, the coaching with enneagram. Louisburg, KS: Ninestar publishing.
Ciarrochi,J.,Chan,A.&Caputi,P.(2000). A critical evaluation of the emotional intelligence construct. Personality and individual differences, 28, 539-561.
Cowan, D.A. (1989).An alternative to the dichotomous interpretation of Jung's psychological Functions: Developing more sensitive measurement technology. Journal of Personality Assessment.53, 459-471.
Dembroski,T.M.,MacDougall,J.M.Costa,P.T.& Grandits,G.A .(1989). Components of hostility as predicators of sudden death and myocardial infarction in the Multiple Risk factor Intervention Trail .Psychosomatic Medicine, 51,514-522.
Dunne,T.,(1999).Enneatypes : Methods& Spirit our nine basic compulsions. Universal publishers.
Helmers,K.F.,Posluszny,D.M.,&Krantz,D.S.(1994) .Associations of Hostility and coronary artery disease:Areview of studies.In A. W. siegman & T.W.smith(eds).Anger,hostility, and the heart (pp.67-96).Hiksdale,NJ:Erlbaum.
Hudson.R. (2000).Understanding the enneagram practical guide to personality types. Boston:Houghton Mifflin.
Hudson.R. (2001).Enneagram transformations. Boston: Houghton Mifflin.
Hudson.R. (2004). Personality types. Using the enneagram for self- discovery. Boston:Houghton Mifflin.
Hudson.R. (2005).The wisdom of the enneagram.Boston: Bantom Books.
Jung,C.G.(1933). Psychological types. New York : Harcourt,Brace and world.
O’Hanrahan,P.(2007).Enneagram professional training program.
Palmer, H. (1995).Enneagram in love and work.USA: Harper Sanfrancisco.
Siegelman, M. (1988).Origins of extroversion- introversion. Journal of Psychology. 69, 85-91.
Stricker, L. J.& Rosss, J.(1962).A description and evaluation of the Myers Briggs type indicator. Princeton, NJ: Educational testing service.
Tallon, R.& Sikora, M.(2006).Awareness to action. Chicago: The university of Scranton center.
Wink, P. (1993). Does Jung need rescuing? [Review of in search of Jung. Historical and philosophical enquiries]. Contemporary Psychology. 38, 1231- 1232.
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