Battell, Chris
Effective listening: business skills
American Society for Training & Development, 2006
 eBooks
Effective listening: business skills
 eBooks
Downs, Lisa J.
Listening skills training
American Society for Training & Development, 2008
 eBooks
Insight
Indonesia Scholars Journal, 2016
 Majalah, Jurnal, Buletin
Dwi Wahyuningsih
The effectiveness of using randall's ESL cyber listening lab in teaching listening comprehension
Kantor Bahasa Banten, 2018
 Artikel Jurnal