Principles of visual programming systems / 
Shi-Kuo Chang, editor. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1990. 
 - x, 372 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>013710765X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual programming (Computer science).