APA-čujuhus (7. p.)
Leypoldt, M. M. (1971). Learning is change. Judson.
Chicago-čujuhus (17. p.)
Leypoldt, Martha M. Learning Is Change. Valley Forge: Judson, 1971.
MLA-čujuhus (9. p.)
Leypoldt, Martha M. Learning Is Change. Judson, 1971.
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