@book { KreativeBildbearbeitung,
    title = "Kreative Bildbearbeitung",
    subtitle = "Faszinierende Ideen & ihre Umsetzungen für Photoshop & Photoshop Elements",
    author = "Gabor {Richter}",
    year = "2019",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/507186"
}