American  psychological  Association  <br/><br/>
Publication  Manual of the  American psychological  Association   The official  source  for  APA Style   Xxi,428 p.: ill. ; 26 cm 
By American  Psychological Association  
 -  7th Edition  
 -  APA l Place: Washington, DC,USA l  1 October  2019 
<br/><br/> APA style,referencing. 
<br/><br/><label>ISBN: </label>978143332161