@book { DunkleSchattenaufdeinerSeele,
    title = "Dunkle Schatten auf deiner Seele",
    author = "Ana {Dee} and Elin {Svensson}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1189237"
}