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.
Lua i Stíl Chicago (17ú heag.)Pennell, Mary E., agus 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.
Lua MLA (8ú heag.)Pennell, Mary E., agus 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.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.