APA (7th ed.) Zitazioa

(1983). Children's early thought: Developments in classification / Susan Sugarman.

Chicago Style (17th ed.) Zitazioa

Children's Early Thought: Developments in Classification / Susan Sugarman. 1983.

MLA (9th ed.) Zitazioa

Children's Early Thought: Developments in Classification / Susan Sugarman. 1983.

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