Pennell, M. E., & Cusack, A. M. (1932). The teacher's manual for the Pennell and Cusack pre-primers (A reprint from "The Teachers' manual for the first grade," revised edition.). Ginn and Company.
Chicago-viite (17. p.)Pennell, Mary E., ja Alice M. Cusack. The Teacher's Manual for the Pennell and Cusack Pre-primers. A reprint from "The Teachers' manual for the first grade," revised edition. Boston: Ginn and Company, 1932.
MLA-viite (8. p.)Pennell, Mary E., ja Alice M. Cusack. The Teacher's Manual for the Pennell and Cusack Pre-primers. A reprint from "The Teachers' manual for the first grade," revised edition. Ginn and Company, 1932.
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