RIEDESEL, C. (1973). Guiding discovery in elementary school mathematics. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)RIEDESEL, C.Alan. Guiding Discovery in Elementary School Mathematics. Englewood cliffs: Prentice Hall, 1973.
Lua MLA (9ú heag.)RIEDESEL, C.Alan. Guiding Discovery in Elementary School Mathematics. Prentice Hall, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.