@book { TrendsportAquacyclingeineempirischeUntersuchungzurKundenzufriedenheit,
    title = "Trendsport Aquacycling - eine empirische Untersuchung zur Kundenzufriedenheit",
    author = "Christian {Kittel}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842815889",
    url = "https://m.diplom.de/document/228538"
}