@book { Machsieglcklich,
    title = "Mach sie glücklich",
    subtitle = "Eine Frau verrät, wie Sie der perfekte Liebhaber werden",
    author = "Marcie {Mai}",
    year = "2014",
    publisher = "venusbooks",
    address = "München, Germany",
    url = "https://www.venusbooks.de/document/285340"
}