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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pennell, Mary E., و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Pennell, Mary E., و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.