Forbes, J. E., & Eicholz, R. E. (1971). Mathematics for elementary teachers. Addison-Wesley Pub. Co.
Lua i Stíl Chicago (17ú heag.)Forbes, Jack E., agus Robert E. Eicholz. Mathematics for Elementary Teachers. Reading, Mass: Addison-Wesley Pub. Co, 1971.
Lua MLA (9ú heag.)Forbes, Jack E., agus Robert E. Eicholz. Mathematics for Elementary Teachers. Addison-Wesley Pub. Co, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.