@book { LiebevolldurchdieTrotzphase,
    title = "Liebevoll durch die Trotzphase",
    author = "Barbara {Weber-Eisenmann} and Lisa {Wurzbach}",
    year = "2022",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1273511"
}