Goelman H. et al (2006). Towards a predictive model of quality in Canadian child care centers. Early Childhood Research Quarterly, 21, pp. 280-295.
Hickey, T. & Lewis, W.G. (2009). Exploring policy and practice in Welsh-medium preschools with children from different language backgrounds. Paper given at Language Policy and Language Learning: New Paradigms, and New Challenges conference, University of Limerick (18-20 June).
Hornberger, N. H. & King, K. A. (1996). Language Revitalisation in the Andes: Can the Schools Reverse Language Shift? Journal of Multilingual and Multicultural Development, 17 (6), pp. 427-441.
Johnson, R. & Swain, M. (1997). Immersion education: International perspectives. Cambridge, UK: Cambridge University Press.
Johnstone, R. (2002). Addressing the 'age factor': some implications for language policy. Strasbourg: Council of Europe Language Policy Division.
Johnstone, R. & McKinstry, R. (2008). Evaluation of EPPI: Early Partial Immersion in French at Walker Road Primary, Aberdeen. Stirling: Scottish CILT.
Lambert, W. & Tucker, G. (1972). Bilingual education of children. The St. Lambert experiment. Rowley, MA: Newbury House.
Mhic Mhathúna, M. & Mac Con Iomaire, M. (2009). Implementing Language Policy in Gaeltacht Naíonraí. Paper given at Language Policy and Language Learning: New Paradigms, and New Challenges conference, University of Limerick (18-20 June).
NICHD (National Institute of Child Health and Human Development) Early Child Care Research Network (2005) Early Child Care and Children's Development in the Primary Grades: Follow-Up Results from the NICHD Study of Early Child Care. American Educational Research Journal, 42, 3, pp. 537-570.
Nikolov, M. & Djigunovic, J. (2006). Recent research on age, second language acquisition and early foreign language learning. Cambridge University Press Annual Review of Applied Linguistics, 26: pp. 234-260.
Peisner-Feinberg E. S. & Burchinal M. R. (1997) Relations between preschool children's childcare experiences and concurrent development: The Cost, Quality and Outcomes Study. Merrill-Palmer Quarterly, 43, 3, pp. 451-477.
Phillipsen L.C., Burchinal M.R., Howes C. & Cryer D. (1997). The Prediction of Process Quality from Structural Features of Child Care. Early Childhood Research Quarterly, 12, pp. 281-303.
Sammons P. et al (2004) The impact of pre-school on young children's cognitive attainments at entry to reception. British Educational Research Journal, 30, 5. pp. 691-712.
Scottish Executive Education Department (2007). Growing Up In Scotland. Edinburgh: Scottish Executive.