@book { PositionierungimLebensstilLabyrinth,
    title = "Positionierung im Lebensstil-Labyrinth",
    author = "Monika {Kritzmöller}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092487"
}