McMahon, Rory J., <br/><br/>
Practical handbook for professional investigators / 
Rory J. McMahon. 
 - Third Edition. 
 - xxii, 557 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781439887226 (hardcover : alk. paper)  RM428.06 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Private investigators--United States--Handbooks, manuals, etc.