Stewart, J. H. (2005). Foreign language study in elementary schools: benefits and implications for achievement in reading and math. Early Childhood Education Journal, 33(1), 11-16.
Mantle-Bromley, C. (1995). Positive attitudes and realistic beliefs: links to proficiency. The Modern Language Journal, 79(iii), 372-386.
Shrum, J. L. & Glisan, E. W. (2005). Teacher’s handbook: Contextualized language instruction (3rd ed.). Boston, MA: Thomson Heinle.