The challenge of effective speaking /

Antzeko izenburuak

• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (1988)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (1994)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (1985)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F.
  Argitaratua: (2000)
• The challenge of effective speaking /
  nork: 353530 Verderber, Rudolph F., et al.
  Argitaratua: (2006)