@book { MallorcaWanderfhrerMallorcaHikingGuide,
    title = "Mallorca Wanderführer (Mallorca Hiking Guide)",
    author = "Pushpa {Morales}",
    year = "2023",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1433597"
}