APA-viite (7. p.)
Charles, C. M. (1995). Introduction to educational research (2nd ed.). Longman Publishers USA.
Chicago-viite (17. p.)
Charles, C. M. Introduction to Educational Research. 2nd ed. White Plains, N.Y.: Longman Publishers USA, 1995.
MLA-viite (9. p.)
Charles, C. M. Introduction to Educational Research. 2nd ed. Longman Publishers USA, 1995.
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