Abdel Khalek Awad, N., & 		Khattab Omar, B.
(2019).
 The style of positive and negative thinking and its relation to the psychological hardness of university students.
<em>Journal Of Tikrit University For Humanities - مجلة جامعة تكريت للعلوم الانسانية, 24</em>(11), 905-941.
doi:10.25130/hum.v24i11.440