Ahmad, J., M. Umar, S. S. karim, M. amaduddin, F. Shah, and I. Hussain. “Design of a Car Wash Waste Water Treatment Process for Local Car Wash Stations”. Journal of the Pakistan Institute of Chemical Engineers, vol. 45, no. 2, Dec. 2017, http://piche.org.pk/journal/index.php/jpiche/article/view/371.