@book { EscortserviceStetszuDiensten,
    title = "Escortservice-Stets zu Diensten",
    author = "Lena {Laune}",
    year = "2017",
    publisher = "roter mund verlag",
    address = "Mannheim, Deutschland",
    url = "https://rotermundverlag.de/document/374319"
}