@book { UnsereTrumewartenhinterdemHorizont,
    title = "Unsere Träume warten hinter dem Horizont",
    author = "Marc {de Sarno}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/999658"
}