@book { ManualforTrainersofSpecialNeedsAdults,
    title = "Manual for Trainers of Special Needs Adults",
    author = "Sofia {Triantafyllou}",
    year = "2015",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/302175"
}