Blackstone's police operational handbook 2018 
Police National Legal Database (PNLD) ; editor Mark Hartley. 
 - 12 ed.. 
 - Oxford :  Oxford University Press,  2018 
 - 866 p. 
<br/><br/><label>ISBN: </label>9780198806158 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>345  / POL'17