Potgieter, Willem, Chantal Olckers, and Lukas Ehlers. “Development of a Measure for Perceived Employment Relationship Quality (PERQ)”. African Journal of Employee Relations 39, no. 2 (February 19, 2019): 165–189. Accessed October 29, 2025. https://unisapressjournals.co.za/index.php/AJER/article/view/5877.