@book{winteler2004professionell,
  address = {Darmstadt},
  author = {Winteler, Adi},
  edition = {3.},
  interhash = {456cb542d68fcf2a00acee45cac2ae9e},
  intrahash = {a48f4e92aef133f5b44cd39265a78955},
  isbn = {3-534-17258-2},
  publisher = {Wissenschaftliche Buchgesellschaft},
  title = {Professionell lehren und lernen},
  url = {http://www.amazon.de/Professionell-lernen-Praxisbuch-Universität-Schule/dp/3534172582},
  year = 2004
}