Velleman, Daniel J. <br/><br/>
How to prove it :  a structured approach / 
Daniel J. Velleman 
 - Cambridge :  Cambridge University Press,  1994 
 - ix, 309 :  ill. ;  24 cm. 
<br/><br/>Bibliography : p. 304. 
<br/><br/><label>ISBN: </label>0521441161  RM139.36 
<br/><br/><label>LCCN: </label>93-14567 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic, Symbolic and mathematical<br/>Mathematics