Steinberg, L. (1993). Adolescence (3rd ed.). McGraw-Hill.
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Dyfyniad Arddull Chicago
Steinberg, Laurence. Adolescence. 3rd ed. New York: McGraw-Hill, 1993.
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Dyfyniad MLA
Steinberg, Laurence. Adolescence. 3rd ed. McGraw-Hill, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.