- http://mason.gmu.edu/~weinberg/lingresources.html
- https://www.squarespace.com/
- http://www.ipatrainer.com/user/index.php?c=vowel_trapezium&a=display_functions&adminID=267&vowelTrapeziumID=36
- http://allthingslinguistic.com/post/67308552090/how-to-remember-the-ipa-vowel-chart
- https://store.cinra.net/artist/308132
sep 15 2016 ∞
aug 12 2017 +
aug 12 2017 +