Module 7.1 Janet F. Werker and Krista Byers-Heinlein, Bilingualism in infancy: first steps in perception and comprehension. Elsebvier, 2008 Module 8.2 Wagner, L., Greene-Havas, N., Gillespie, R., Development in Children’s Comprehension of Linguistic Register, 2010 Module 14.4 Nigel Williams, Lost Tongues, 2009