Hatfield, M. M., Edwards, M. T., & Bitter, G. G. (1993). Mathematics methods for the elementary and middle school (2nd ed.). Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Hatfield, Mary M., Mary Tanner Edwards, agus Gary G. Bitter. Mathematics Methods for the Elementary and Middle School. 2nd ed. Boston: Allyn and Bacon, 1993.
Lua MLA (9ú heag.)Hatfield, Mary M., et al. Mathematics Methods for the Elementary and Middle School. 2nd ed. Allyn and Bacon, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.