Woollams, Geoffrey. 1996. A grammar of Karo Batak, Sumatra. (Pacific Linguistics, Series C, 130.)
@book{gasttdir-woollamsgrammar1996, author = {Woollams, Geoffrey}, number = {130}, series = {Pacific Linguistics, Series C}, title = {A grammar of Karo Batak, Sumatra}, year = {1996} }