Dravalolgyi, Tibor(8-th International Congress of the International Association on Public and Nonprofit Marketing "New Approaches in Public and Nonprofit Marketing Research & Practice", Valencia, 17-19 June 2009, 2010-07-05)
Drávavölgyi, Tibor(The 10th International Congress of the International Association on Public and Nonprofit Marketing "The role of Public and Nonprofit Marketing on the new sustainable development model", Porto, 16-17 June, 2011)