Goyal, P., Kumar, D., Dixit, S., Srivastav, S. and Singh, A. 2016. Essential criteria for quality OPD services as perceived by patients in a tertiary care hospital in Faridabad City. International Journal of Research in Medical Sciences. 4, 2 (Dec. 2016), 441–445. DOI:https://doi.org/10.18203/2320-6012.ijrms20160292.