American Psychological Association. (2012). Publication Manual of the American Psychological Association (6th ed.). American Psychological Association.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)American Psychological Association. Publication Manual of the American Psychological Association. 6th ed. Washington: American Psychological Association, 2012.
MLA -ийн эшлэл (9 дэх хэвлэлт)American Psychological Association. Publication Manual of the American Psychological Association. 6th ed. American Psychological Association, 2012.
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