Cita APA (7a ed.)
Hechinger, F. M. d. (1966). Pre-school education today.
Cita estilo Chicago (17a ed.)
Hechinger, Fred M. de. Pre-school Education Today. 1966.
Cita MLA (9a ed.)
Hechinger, Fred M. de. Pre-school Education Today. 1966.
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