Powerful presentation skills - Vol.1, 2 & 3

Bibliographic Details
Main Author: Smith, Debra
Format: Book
Language:English
Published: Boulder: CareerTrack Publications, [19--].
Subjects:
Description
Physical Description:Duration : 59 min. (Vol. 2).
Duration : 1 hour 8 min. (Vol.1).
Duration : 1 hour 26 min. (Vol.3).