Ladefoged, Peter. 1989. Illustrations of the IPA: American English. Journal of the International Phonetic Association 19. 41–44. Cambridge University Press.
@article{eng_ladefoged1989,
author = {Ladefoged, Peter},
journal = {Journal of the International Phonetic Association},
number = {2},
pages = {41–44},
publisher = {Cambridge University Press},
title = {Illustrations of the IPA: American English},
volume = {19},
year = {1989}
}