@book { DieGrndungeinesInternetReisebrosfrWellnessReisen,
    title = "Die Gründung eines Internet-Reisebüros für Wellness-Reisen",
    author = "Oliver {Wolschon}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832429560",
    url = "https://m.diplom.de/document/218679"
}