@book {hierhold_sicher_2008, title = {Sicher pr{\"a}sentieren. Wirksamer vortragen}, year = {2008}, note = {HB 12}, publisher = {Redline Wirschaft}, organization = {Redline Wirschaft}, address = {M{\"u}nchen}, keywords = {Information, Pr{\"a}sentation, Vortrag}, author = {Hierhold, Emil} }