Commerce:  made simple 
/by Geoffrey Whitehead 
 - 11th ed. 
 - London:  Heinemann,  1985. 
 - xiii,278 p. :  ill. ;  22 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0434984809 9780434985425 
<br/><br/><label>Dewey Class. No.: </label>380.1  / WHI