@book { Pricing,
    title = "Pricing",
    subtitle = "Die letzten Schätze heben - Gewinnsteigerung durch Preismanagement in B2B-Unternehmen",
    author = "Siegfried {Lettmann}",
    year = "2026",
    publisher = "C.H.Beck",
    address = ", Deutschland",
    url = "https://vahlen.openpublishing.com/document/1696394"
}