http://iteslj.org/Articles/Schoepp-Songs.html
http://www.cal.org/caela/esl_resources/digests/music.html
http://krpb.pbworks.com/f/music-esl.pdf
http://idiomas.ens.uabc.mx/plurilinkgua/docs/v3/2/EvonaUseofMusicEN.pdf
www.ccsenet.org/journal/index.php/elt/article/download/23819/15117