Rivera, R. A. (2006). Task levels and information sources in mathematical problem posing by pre-service secondary school teachers. Saint Mary's University Research Journal.
Chicago-Zitierstil (17. Ausg.)Rivera, Rowena A. "Task Levels and Information Sources in Mathematical Problem Posing by Pre-service Secondary School Teachers." Saint Mary's University Research Journal 2006.
MLA-Zitierstil (9. Ausg.)Rivera, Rowena A. "Task Levels and Information Sources in Mathematical Problem Posing by Pre-service Secondary School Teachers." Saint Mary's University Research Journal, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.