Maddieson & Anderson (1994), p. 164. Maddieson, Ian; Anderson, Victoria (1994). "Phonemic Structures of Iaai"(PDF). UCLA Working Papers in Phonetics. 87: Fieldwork Studies of Targeted Languages II. Los Angeles: UCLA: 163–182.
Nicholas, Nick (2003). "Greek-derived IPA symbols". Greek Unicode Issues. University of California, Irvine. Archived from the original on 2013-12-19. Retrieved 2013-12-18.
Nicholas, Nick (2003). "Greek-derived IPA symbols". Greek Unicode Issues. University of California, Irvine. Archived from the original on 2013-12-19. Retrieved 2013-12-18.