@book { OnlineFashionRetailingRetailBankingandManagementConsulting,
    title = "Online Fashion Retailing, Retail Banking, and Management Consulting",
    author = "Marvin {Mertens}",
    year = "2015",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/293089"
}