Wyckoff, D. C. (1956). A psychological description of youth and adults. Princeton Theological Seminary.
Chicago-viite (17. p.)Wyckoff, D. Campbell. A Psychological Description of Youth and Adults. Princeton, N.J.: Princeton Theological Seminary, 1956.
MLA-viite (8. p.)Wyckoff, D. Campbell. A Psychological Description of Youth and Adults. Princeton Theological Seminary, 1956.
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