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ideas-4639	u.lipi.go.id	http://u.lipi.go.id/1457703302
ideas-4639	doi.org	https://doi.org/10.20448/journal.509.2020.73.229.234
ideas-4639	doi.org	https://doi.org/10.33650/pjp.v7i1.1136
ideas-4639	doi.org	https://doi.org/10.1162/003355303322552801
ideas-4639	doi.org	https://doi.org/10.4108/eai.27-4-2019.2285331
ideas-4639	doi.org	https://doi.org/10.4324/9781315833774
ideas-4639	doi.org	https://doi.org/10.18260/1-2--20540
ideas-4639	doi.org	https://doi.org/10.18260/1-2--20540
ideas-4639	doi.org	https://doi.org/10.18488/journal.61.2017.54.45.60
ideas-4639	doi.org	https://doi.org/10.21776/ub.educafl.2021.004.02.03
ideas-4639	doi.org	https://doi.org/10.1016/j.procs.2016.02.056
ideas-4639	doi.org	https://doi.org/10.2478/amph-2022-0035
ideas-4639	doi.org	https://doi.org/10.1111/j.1460-2466.1999.tb02809.x
ideas-4639	doi.org	https://doi.org/10.18178/ijiet.2019.9.4.1214
ideas-4639	doi.org	https://doi.org/10.26858/ijole.v4i2.8188
ideas-4639	doi.org	https://doi.org/10.1088/1742-6596/1806/1/012100
ideas-4639	doi.org	https://doi.org/10.2991/secret-18.2018.28
ideas-4639	doi.org	https://doi.org/10.15388/verb.2017.8.11354
ideas-4639	doi.org	https://doi.org/10.1080/23311975.2018.1423770
ideas-4639	doi.org	https://doi.org/10.34105/j.kmel.2020.12.002
ideas-4639	doi.org	https://doi.org/10.5430/ijhe.v8n1p37