@book { SocialEntrepreneurshipSocialBusinessDieZukunftunsererWirtschaft,
    title = "Social Entrepreneurship, Social Business. Die Zukunft unserer Wirtschaft?",
    author = "",
    year = "2017",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/364543"
}