Roy, M. M. (1965). Spark: A handbook for teachers of elementary social studies. Educational Service.
Cita Chicago Style (17a ed.)Roy, Mary M. Spark: A Handbook for Teachers of Elementary Social Studies. Stevensville, Michigan: Educational Service, 1965.
Cita MLA (9a ed.)Roy, Mary M. Spark: A Handbook for Teachers of Elementary Social Studies. Educational Service, 1965.
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