abdullah et al. 2012, abdullah et al. 2016, abdullah et al. 2019, abdullah et al. 2023, abdullah et al. 2020, abdullah et al. 2017, abdullah et al. 2021, abdullah et al. 2018, abdullah et al. 2009
abdullah et al. 2012. There are any references about abdullah et al. 2012 in here. you can look below.