[1]Archivado el 3 de marzo de 2016 en Wayback Machine., Caritas, Community & Higher Education Service. 2010. Private Supplementary Tutoring of Secondary Students: Investigation Report. Hong Kong: Caritas.
Alzahrani, Turkey; Leko, Melinda (2018). «The Effects of Peer Tutoring on the Reading Comprehension Performance of Secondary Students with Disabilities: A Systematic Review». Reading & Writing Quarterly34: 1-17. doi:10.1080/10573569.2017.1302372.
[1]Archivado el 3 de marzo de 2016 en Wayback Machine., Caritas, Community & Higher Education Service. 2010. Private Supplementary Tutoring of Secondary Students: Investigation Report. Hong Kong: Caritas.