A PHP Error was encountered

Severity: Notice

Message: Undefined offset: 1

Filename: controllers/Document.php

Line Number: 69

Backtrace:

File: /home/rama/public_html/application/controllers/Document.php
Line: 69
Function: _error_handler

File: /home/rama/public_html/index.php
Line: 296
Function: require_once

@thesis{thesis, author={Wayan Gian Nita Pertiwi }, title ={THE USE OF UNDERCOVER GAME IN IMPROVING ENGLISH COURSE STUDENTS' VOCABULARY MASTERY}, year={2023}, url={https://katalog.ukdw.ac.id/8007/}, abstract={The Use of Undercover Game in Improving English Course Students' Vocabulary Mastery} }