Wason, P. C. <br/><br/>
Thinking and reasoning  selected readings / 
edited by P. C. Wason and P. N. Johnson-Laird. 
 - Harmondsworth :  Penguin,  1968. 
 - 431 p. :  ill. ;  19 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Problem solving.<br/>Reasoning.<br/>Thought and thinking.