Protheroe, N., Shellard, E., & Turner, J. (2004). Helping struggling learners in the elementary and middle grades. Educational Research Service.
Chicago-Zitierstil (17. Ausg.)Protheroe, Nancy, Elizabeth Shellard, und Jennifer Turner. Helping Struggling Learners in the Elementary and Middle Grades. Arlington, VA: Educational Research Service, 2004.
MLA-Zitierstil (9. Ausg.)Protheroe, Nancy, et al. Helping Struggling Learners in the Elementary and Middle Grades. Educational Research Service, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.