@book { MarketingkonzeptamBeispieleinesFitnessStudiosinDresden,
    title = "Marketingkonzept am Beispiel eines Fitness-Studios in Dresden",
    author = "Antje {Linke}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656065401",
    url = "https://www.hausarbeiten.de/document/182166"
}