NGUYEN THI, P. N.; NGUYEN, T. L. 11TH GRADE EFL LEARNERS’ PERCEPTION OF THE AUTHENTICITY OF THE NEW TEXTBOOK ENGLISH 11-TIENG ANH 11. TRA VINH UNIVERSITY JOURNAL OF SCIENCE; p-ISSN: 2815-6072; e-ISSN: 2815-6099, v. 12, n. 48, p. 33-41, 24 set. 2022.