AMERICAN PSYCHOLOGICAL ASSOCIATION. (2013). PUBLICATION MANUAL OF THE AMERICAN PSYCHOLOGICAL ASSOCIATION (6TH ED.). WASHINGTON.
Chicago-viite (17. p.)AMERICAN PSYCHOLOGICAL ASSOCIATION. PUBLICATION MANUAL OF THE AMERICAN PSYCHOLOGICAL ASSOCIATION. 6TH ED. AMERICAN PSYCHOLOGICAL ASSOCIATION: WASHINGTON, 2013.
MLA-viite (9. p.)AMERICAN PSYCHOLOGICAL ASSOCIATION. PUBLICATION MANUAL OF THE AMERICAN PSYCHOLOGICAL ASSOCIATION. 6TH ED. WASHINGTON, 2013.
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