“…Table 1 shows that out of 95 selected studies, 28 studies (29.47%) have applied the SERVQUAL model, followed by 20 studies (21.05%) reported application of LibQUAL model, 8 studies (8.42%) applied the Structural Equation Modelling, 7 studies (7.36%) measured the service quality by applying two service quality models Cabrerizo et al (2017), Chen (2016), Li and Yang (2013) and Xi et al (2018) 4 studies (4.21%) applied a self proposed model (Barhoumi, 2016; Borbely, 2011; Powelson and Reaume, 2012; Mehrjerdi, 2017) and 2 studies reported the application of a fuzzy based model (Tooranloo et al, 2018; Lee et al, 2011). Twenty-five studies (26.31%) had no mention of any models Corrall (2017), Brettle et al (2011), Cabrerizo et al (2012), Einasto (2014), Gupta and Singh (2012), Helman and Horowitz (2001), Heradio et al (2012), Hernon and Nitecki (2001), Kim (2011), Partap (n.d), Rahimi et al (2018), Stokić et al (2019).…”