Wetenschappelijke literatuur

• Birdsong, D. (2013). The Critical Period Hypothesis for Second Language Acquisition: Tailoring the Coat of Many Colors. In: M. Pawlak & L. Aronin (Eds.), Essential Topics in Applied Linguistics and Multilingualism. Springer International Publishing Switzerland.
• Fromkin, V., Krashen, S., Curtiss, S., Rigles, D., & Rigler, M. (1974). The Development of Language in Genie: a Case of Language Acquisition beyond the “Critical Period” [PDF] Brain and Language, 1, 81-107.
• Lobo, V.S. (2013). Hoe eerder, hoe beter? Meningen en ervaringen bij Engels in groep 1 en groep 3 op de basisschool. Levende Talen Tijdschrift, 14, 2-12.