Allen, P. <br/><br/>
Sales and sales management / 
P. Allen. 
 - 2nd ed. 
 - Plymouth :  Macdonald,  1979 
 - 274 p. 
<br/><br/> Open access. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sales management.<br/>Salesmen and salesmanship.<br/>Marketing.