Fromm, E. (1971). Summerhill: Pro y contra (1a. ed.). Fondo de Cultura Económica (F.C.E).
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Dyfyniad Arddull Chicago
Fromm, Erich. Summerhill: Pro Y Contra. 1a. ed. D.F.: Fondo de Cultura Económica (F.C.E), 1971.
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Dyfyniad MLA
Fromm, Erich. Summerhill: Pro Y Contra. 1a. ed. Fondo de Cultura Económica (F.C.E), 1971.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.