na INLIS000000000084889 eng 0010-1117010012 The Challenge of Effective Speaking in a Digital Age 17th ed Rudolph F. Verderber Verderber, Rudolph F. Australia : Cengage Learning, 2018 xxi, 323 hlm. 28 cm. 978-1-305-94819-8 808.51 Ver c 1 808.51 PUBLIC SPEAKING 187417212 187417212