APA-viite (7. p.)
(2014). Standards for reporting research: Free bonus report. Pyrczak publishing.
Chicago-viite (17. p.)
Standards for Reporting Research: Free Bonus Report. Glendale, CA: Pyrczak publishing, 2014.
MLA-viite (9. p.)
Standards for Reporting Research: Free Bonus Report. Pyrczak publishing, 2014.
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