William Stallings <br/><br/>
Hnadbook of computer communication standards VI:The OSI model and OSI related standards 

 - 6 
 -  Howard W Sams  1990 
 - 337 
<br/><br/>  
<br/><br/><label>ISBN: </label>0-672-22697-9 
<br/><br/><label>Dewey Class. No.: </label>004.728.