Effective speaking /

Antzeko izenburuak

• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F., et al.
  Argitaratua: (2006)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (1988)
• The Challenge of effective speaking /
  nork: 517767 Rudolph, Verderber F., et al.
  Argitaratua: (2010)
• Effective public speaking /
  nork: Malaysia Productivity Corporation 603541
  Argitaratua: (2008)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (1991)