58 DAFTAR PUSTAKA
Bangun, Tridah. 2006. Sifat dan Tabiat Orang Karo. Jakarta: Yayasan Lau Simalem.
Boyer. 2006. Concept In Biochemistry. Third Edition. New York: John Wiley and Sons.
Dayakisni, T dan Hudaniah. 2003. Psikologi Sosial. Malang: UMM Press
Deddy Mulyana, 2005. Komunikasi Efektif : Suatu Pendekatan Lintas Budaya. Yang Menerbitkan PT Remaja Rosdakarya : Bandung.
Fresco, D. M., Rytwinski, N. K. & Craighead, L. W. 2007. Explanatory Flexibility and Negative Life Events Interact to Predict Depressions Sympto. Journal of Social and Clinical Psychology Vol. 26 No.5
Hall, Calvin, Gardner Lindzey, John C. Loehlin, Martin Manosevitz. 1985. Introduction to Theories of Personality. Canada : John Wiley & Sons, inc.
Hadi, S. 2000. Metodologi Research. Yogyakarta: Penerbit Andi
Koentjoroningrat. 1984. Kebudayaan Mentalitas dan Pembangunan. Jakarta: Gramedia.
Karongku, Taneh. 2013. Filosofi Endi Enta.
pada tanggal 29 September 2015.
Mrinalini Purandare. 2010. Adolescent Helplessness: Depression, Explanatory Style and Life Events as Correlates of Hopelessness. S.N.D.T Women’s University, Mumbai. Jurnal
Muluk, H. 1995. Ketidakberdayaan dan Perilaku dan perilaku ugal-ugalan supir metromini. Universitas Indonesia. Jurnal
Prinst, Darwan. 2004. Adat Karo.Bina Media Prinst Medan.
Purwanto. 2008. Metode Penelitian Kuantitatif untuk Psikologi dan Pendidikan. Yogyakarta: Pustaka Belajar.
Segal ZV, Ingram RE. Mood Priming and Construct Activation in Test of Cognitive Vulnerability to Unipolar Depression. Clinical Psychology Rev. 1994; 14:663-95
Sugiarto, Siagian, D., Sunaryanto, L. T., & Oetomo, D. S. 2003. Teknik Sampling. Jakarta: Gramedia Pustaka Utama
59 Schultz, D., & Sydney, S. 1993. Theories of Personality. California: Brooks/Cole
Publishing Company.
Peterson, C. & Seligman , M. E. P. 1988. Explanatory Style and Illness. Journal of Personality.
Peterson, C. & Steen, T. 2002. Optimistic Explanatory Style. Handbook of Positive Psychology. New York: Oxford University Press.
Taylor, Shelley E. 2003. Health Psychology 5th edition. New York: McGraw-Hill
pada tanggal 29 September 2015
2015
