MARHEFKOVÁ, Anna. Management competencies and their impact on the efficiency of organizations. - Registrovaný: Web of Science. In CITPM 2016. Contemporary issues in theory and practice of management. International conference. CITPM 2016. Contemporary issues in theory and practice of management : proceedings of the 1st international conference : 21st-22nd April 2016, Częstochowa, Poland. - Częstochowa : Wydawnictwo Wydziału Zarządzania Politechniki Częstochowskiej, 2016. ISBN 978-83-65179-43-2, pp. 276-280.