Education Development Center. (2000). Impact mathematics: Algebra and more for the middle grades. Glencoe/McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Education Development Center. Impact Mathematics: Algebra and More for the Middle Grades. New York: Glencoe/McGraw-Hill, 2000.
Lua MLA (9ú heag.)Education Development Center. Impact Mathematics: Algebra and More for the Middle Grades. Glencoe/McGraw-Hill, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.