Salman Ayyaz, et al. “IMPACT OF PSYCHOLOGICAL CONTRACT ON EMPLOYEE WORK ENGAGEMENT AT SUGAR INDUSTRY, DERA ISMAIL KHAN (KPK)”. PalArch’s Journal of Archaeology of Egypt Egyptology, vol. 18, no. 10, Aug. 2021, pp. 638-47, https://archives.palarch.nl/index.php/jae/article/view/9859.