Y. M. Suleiman Khatatbeh and E.-W. B. Abdullah Fareh Miri, “Types of Morning-Evening Personality and its Relationship with Self-Vitality and Procrastination Behavior among University Students”, Psychosocial rehabilitation, vol. 25, no. 3, pp. 234–260, Jun. 2021, doi: 10.61841/ghybq234.