Dewi Kusumayati, L. EVALUATING ENGLISH TEXTBOOK CURRENTLY IN USE AT “ENGLISH BITES” (ENGLISH EXTRACURRICULAR PROGRAM EXISTED IN CIVIL AVIATION POLYTECHNIC OF SURABAYA). J. Penelit. Poltekbang Surabaya 2022, 6 (4), 247-255. https://doi.org/10.46491/jp.v6i4.814.