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