Cupillari, Antonella <br/><br/>
The nuts and bolts of proofs :  an introduction to mathematical proofs / 
Antonella Cupillari 
 - 4th ed. 
 - Boston, MA :  Elsevier Academic Press,  c2013 
 - ix, 283 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780123822178 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Proof theory