Research methods in psychology Smith Jonathan A., Breakwell Glynis M., Wright Daniel B. 4. ed : London : SAGE : 2011 : 602 s. : ISBN: 0857022636 Search the University Library catalogue
Morling Beth. Research methods in psychology : evaluating a world of information Second Edition. : New York : W. W. Norton & Company : 2014. : pages cm : ISBN: 9780393936933 Search the University Library catalogue