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Lua i Stíl Chicago (17ú heag.)University of Exeter. Centre for Innovation in Mathematics Teaching agus Nyíregyházi Főiskola. Mathematics Department. International Journal for Mathematics Teaching and Learning. [Exeter] : Nyiregyháza, Hungary: Centre for Innovation in Mathematics Teaching at Exeter University ; Mathematics Dept. at Bessenyei College, 2000.
Lua MLA (9ú heag.)University of Exeter. Centre for Innovation in Mathematics Teaching agus Nyíregyházi Főiskola. Mathematics Department. International Journal for Mathematics Teaching and Learning. Centre for Innovation in Mathematics Teaching at Exeter University ; Mathematics Dept. at Bessenyei College, 2000.