@book { DasBabyprinzip,
    title = "Das Babyprinzip",
    subtitle = "Was wir im Job von Babys lernen können",
    author = "Stefan {Rippler}",
    year = "2025",
    publisher = "C.H.Beck",
    address = ", Deutschland",
    url = "https://vahlen.openpublishing.com/document/1661642"
}