@book { DiemysterisenAbenteuerdesjungenLeonardoDaVincisFlleBand16, title = "Die mysteriösen Abenteuer des jungen Leonardo (Da Vincis Fälle - Band 1-6)", author = "Alfred {Bekker}", year = "2019", publisher = "Uksak E-Books", address = "Lengerich, Deutschland", url = "https://uksakebooks.grin.com/document/298670" }