@book { Astudyofthedifferentaspectsofstaffretentionstrategies,
    title = "A study of the different aspects of staff retention strategies",
    subtitle = "A comparison between small, medium and large German knowledge companies",
    author = "Arne {Becker-Carus}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836633338",
    url = "https://m.diplom.de/document/227074"
}