author = { Büttner, Katrin AND Knapp, Thomas Wiley-VCH },

title = { Nachrichten verschlüsseln für Dummies Junior },

publisher = {Wiley},

publisher = {},

isbn = {9783527715770},

keywords = { Jugendsachbuch },

year = {[2019]},

year = {, © 2019},

booktitle = {... für Dummies Junior},

address = { Weinheim , },

url = { http://slubdd.de/katalog?TN_libero_mab2 }