Wulandari, W. ., Sibarani, B. . and Pulungan, A. H. (2021) “CULTURE AND INTERLANGUAGE STAGES EFFECT ON EFL STUDENTS™ POLITENESS IN REFUSALS”, LINGUISTIK TERAPAN, 18(2), pp. 166–171. doi: 10.24114/lt.v18i2.27895.