@incollection{Zerbian2013,
  author    = {Sabine Zerbian},
  title     = {Questions in Northern Sotho},
  booktitle = {Papers in Bantu grammar and description / editors: Laura J. Downing, Lutz Marten \& Sabine Zerbian, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Typologie und Universalienforschung, Berlin, 2006, : ZAS papers in linguistics ; Nr. 43},
  volume    = {43},
  url       = {http://www.zas.gwz-berlin.de/189.html},
  year      = {2013},
}