Hubbard, Geoffrey. <br/><br/>
Quaker by convincement. 

 - Harmondsworth :  Penguin,  1974. 
 - 254 p. ;  18 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 245-246. 
<br/><br/><label>ISBN: </label>0140216634 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Society of Friends