@book{ECDL_1,
author = "Σιδηρόπουλος, Νίκος and Χατζηγεωργίου, Νίκος",
publisher = "LibrisTech ΑΕ",
title = "{E}uropean {C}omputer {D}riving {L}icence (ECDL), {Ε}νότητα 6: {Π}αρουσιάσεις, {Ε}λληνική Έκδοση {P}owerPoint 2000 ",
year = "2003",
}