Gerardo, B. D. (2000). Effects of a computer tutorial program on problem-solving skills, achievement and attitude towards mathematics.
Lua i Stíl Chicago (17ú heag.)Gerardo, Bobby D. Effects of a Computer Tutorial Program on Problem-solving Skills, Achievement and Attitude Towards Mathematics. 2000.
Lua MLA (9ú heag.)Gerardo, Bobby D. Effects of a Computer Tutorial Program on Problem-solving Skills, Achievement and Attitude Towards Mathematics. 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.