@book { ImmobilienprojektentwicklungamBeispieleinesHotels, title = "Immobilienprojektentwicklung am Beispiel eines Hotels", author = "Christian {Blankenstein}", year = "2015", publisher = "BACHELOR + MASTER PUBLISHING", address = "Hamburg, Deutschland", url = "https://m.bachelor-master-publishing.de/document/297799" }