Garstens, H. L., & Jackson, S. B. (1967). Mathematics for elementary school teachers. Macmillan.
Lua i Stíl Chicago (17ú heag.)Garstens, Helen L., agus Stanley B. Jackson. Mathematics for Elementary School Teachers. New York: Macmillan, 1967.
Lua MLA (9ú heag.)Garstens, Helen L., agus Stanley B. Jackson. Mathematics for Elementary School Teachers. Macmillan, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.