@inbook{64573,
  author       = {{Keatinge, Dagmar and Keßler, Jörg-U.}},
  booktitle    = {{Research in Second Language Acquisition: Empirical Evidence Across Languages}},
  isbn         = {{978-1-4438-0961-0}},
  pages        = {{67--92}},
  publisher    = {{Cambridge Scholar Press}},
  title        = {{{The Acquisition of the Passive Voice in L2-English: Perception and Production}}},
  year         = {{2009}},
}

@book{64576,
  editor       = {{Keßler, Jörg-U. and Keatinge, Dagmar}},
  isbn         = {{978-1-4438-0961-0}},
  publisher    = {{Cambridge Scholar Press}},
  title        = {{{Research in Second Language Acquisition: Empirical Evidence Across Languages}}},
  year         = {{2009}},
}