Woollams, Geoff. 2006. Karo Batak. In Adelaar, Alexander and Himmelman, Niklaus (eds.) 534–561. 1st edn. Routledge.
@inbook{1665_btx_karobatak1,
author = {Woollams, Geoff},
booktitle = {The Austronesian Languages of Asia and Madagascar},
chapter = {19},
edition = {1st},
editor = {Adelaar, Alexander and Himmelman, Niklaus},
pages = {534–561},
publisher = {Routledge},
series = {Routledge Language Family Series},
title = {Karo Batak},
year = {2006}
}