Paper  bibtex   

@misc{Toller2017,
   author   = {Nina Toller},
   title    = {{Erstellen und Anwenden von QR-Codes}},
   url      = {https://docs.google.com/presentation/d/1tUV6xs-MNTSZD-gHyAQJdfwKkdjl54ncFPR5PFmRWeQ/edit#slide=id.g1b22d38d33_0_226},
   urldate  = {2017-03-08},
   date     = {2017-03-06},
   annote   = {https://tollerunterricht.com}
}