@book { DerUmgangmitAngstaufdemWegmenschlicherReifung,
    title = "Der Umgang mit Angst auf dem Weg menschlicher Reifung",
    author = "Margarita {Ueffing}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097860"
}