@book { SigmundFreudSeinePersnlichkeitundseineWirkung,
    title = "Sigmund Freud. Seine Persönlichkeit und seine Wirkung",
    subtitle = "Sigmund Freud’s Mission. An Analysis of His Personality and Influence",
    author = "Erich {Fromm} and Rainer {Funk}",
    year = "2015",
    publisher = "Edition Erich Fromm",
    address = "München, Deutschland",
    url = "https://books.openpublishing.com/document/301558"
}