@book { ProfitableHotelGuestManagementTheFactorsInvolvedinandtheImportanceofFollowingaGuestRelationshipApproachintheIrishLuxuryHotelSector,
    title = "Profitable Hotel Guest Management: The Factors Involved in and the Importance of Following a Guest Relationship Approach in the Irish Luxury Hotel Sector",
    author = "Malte {Kempen}",
    year = "2012",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842833890",
    url = "https://m.diplom.de/document/229254"
}