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C., P., R., L., H., J., W. (1981). Teaching social studies in the elementary school / Ralph C. Preston, Wayne L. Herman Jr (Ed.ke-5). New York: Holt, Rinehart and Winston.

Gaya MLA

Preston, Ralph, C.., Herman, Jr,, Wayne, L.. "Teaching social studies in the elementary school / Ralph C. Preston, Wayne L. Herman Jr". Ed.ke-5 New York: Holt, Rinehart and Winston, 1981. Textbook.