Hargis, C. H. (1990). Grades and grading practices: Obstacles to improving education and to helping at-risk students. Thomas.
Chicago-Zitierstil (17. Ausg.)Hargis, Charles H. Grades and Grading Practices: Obstacles to Improving Education and to Helping At-risk Students. Springfield, Ill: Thomas, 1990.
MLA-Zitierstil (9. Ausg.)Hargis, Charles H. Grades and Grading Practices: Obstacles to Improving Education and to Helping At-risk Students. Thomas, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.