@book { TrainingasinvestmenttoolforimprovingefficiencyintheNationalAirlineofGhana,
    title = "Training as investment tool for improving efficiency in the National Airline of Ghana",
    author = "Gabriel  {Dwomoh}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656164999",
    url = "https://www.hausarbeiten.de/document/191468"
}