@incollection{Zerres2018,
  author    = {Christopher Zerres},
  title     = {Online-Marktforschung},
  series = {Handbuch Marketing-Methodik},
  volume    = {1},
  editor    = {Christopher Zerres},
  edition   = {2.},
  publisher = {Bookboon},
  address   = {London},
  isbn      = {978-87-403-2273-6},
  pages     = {179 -- 185},
  year      = {2018},
  language  = {de}
}