Maddieson, Ian. 2013. Glottalized Consonants. In Matthew S. Dryer and Martin Haspelmath (eds.), The World Atlas of Language Structures Online. Leipzig: Max Planck Institute for Evolutionary Anthropology.
@incollection{maddieson2013wals7,
address = {Leipzig},
author = {Ian Maddieson},
booktitle = {The World Atlas of Language Structures Online},
editor = {Matthew S. Dryer and Martin Haspelmath},
publisher = {Max Planck Institute for Evolutionary Anthropology},
title = {Glottalized Consonants},
url = {https://wals.info/chapter/7},
year = {2013}
}