Biehler, R. (1994). Didactics of Mathematics as a scientific discipline. Kluwer Academic Publishers.
Lua i Stíl Chicago (17ú heag.)Biehler, Rolf. Didactics of Mathematics as a Scientific Discipline. Dordrecht: Kluwer Academic Publishers, 1994.
Lua MLA (9ú heag.)Biehler, Rolf. Didactics of Mathematics as a Scientific Discipline. Kluwer Academic Publishers, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.