@book { WhyShouldCompaniesInvestinSocialMediaMarketing,
    title = "Why Should Companies Invest in Social Media Marketing?",
    subtitle = "Parameters and Means for Performance Measurement",
    author = "Viktoria {Schoja}",
    year = "2016",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/317158"
}