Yardley Gary <br/><br/>
7 days to optimum sales performance / 
Gary Yardley , Jan Kelly 
 - Malaysia :  Times books international ,  1996 
 - 176p. ;  İll :  20 cm. 
<br/><br/><label>ISBN: </label>9812046542 
<br/><br/><label>LC Class. No.: </label>BF481