Learning American Sign Language: Beginning & Intermediate/ 
Tom L. Humphries, Carol A. Padden, Robert Hills, Peggy Lott and  Daniel W. Renner 
 - 2 ed . 
 - UK:  Pearson ,  c 2013 
 - 1 online Resource 
<br/><br/> https://buku.app/details/59525 
<br/><br/><label>ISBN: </label>9781292037585