Liebmann, Robert. <br/><br/>
The Blue Angel: 
an authorized translation of the German continuity. 
 - London,  Lorrimer Publishing Co.,  1968. 
<br/><br/> Script of the motion picture Der blaue Engel, directed by Josef von Sternberg after a free adaption of the novel Professor Unrath by Heinrich Mann. 
<br/><br/><label>ISBN: </label> 12/6 
<br/><br/><label>LCCN: </label>70437834 //r83 
<br/><br/><label>Nat. Bib. No.: </label>B69-19664 
<br/><br/><label>LC Class. No.: </label>PN1997  / .L5613 1968b 
<br/><br/><label>Dewey Class. No.: </label>832/.9/12