Introduction to quadratic forms over fields  
Lam, T. Y. 
 - Providence, R.I. :  American Mathematical Society,  2005 
 - xxi, 550 p. :  ill. ;  27 cm. 
 - Graduate studies in mathematics ;  v. 67 .
<br/><br/><label>ISBN: </label>0821810952 (alk. paper)