Cooper, H.; Charlton, K.; Valentine, J. C.; Muhlenbruck, L. (2000). "Making the most of summer school: a meta-analytic and narrative review". Monographs of the Society for Research in Child Development. 65 (1): i–v, 1–118, discussion 119–27. doi:10.1111/1540-5834.00059. PMID12467098.
Cooper, H.; Charlton, K.; Valentine, J. C.; Muhlenbruck, L. (2000). "Making the most of summer school: a meta-analytic and narrative review". Monographs of the Society for Research in Child Development. 65 (1): i–v, 1–118, discussion 119–27. doi:10.1111/1540-5834.00059. PMID12467098.