(1970). The crisis in American education: An analysis and a proposal. Sudbury Valley School.
Lua i Stíl Chicago (17ú heag.)The Crisis in American Education: An Analysis and a Proposal. Framingham, Mass.: Sudbury Valley School, 1970.
Lua MLA (8ú heag.)The Crisis in American Education: An Analysis and a Proposal. Sudbury Valley School, 1970.
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