[1] Marcos, Kathleen M. and Joy Kreeft Peyton (2000), Promoting a Language Proficient Society: What You Can Do, ERIC Clearinghouse on Languages and Linguistics
www.cal.org/resources/digest/0001promoting.html

[2] Grosse, Christine Uber (2004): The Competitive Advantage of Foreign Languages and Cultural Knowledge. The Modern Language Journal Vol 88, Issue 3: 351-373

[3] The College Board (2004). 2004 College-Bound Seniors : A profile of SAT Program Test-Takers. New York, NY: College Entrance Examination Board, 2004, Table 3.3, p.5

[4] Horn, L. & Kojaku, L.K. (2001). High school academic curriculum and the persistence path through college> Persistence and transfer behavior of undergraduates 3 years after entering 4-year institutions. NCES 2001-163. Washington, DC: U.S. Department of Education. (ED456694)

[5] Asher, J. J., & Garcia, R. (1969). The optimal age to learn a foreign language. Modern Language Journal, 53, 334- 341s

[6] Hakuta, Kenjii (1986), Cognitive Development of Bilingual Children. Los Angeles: University of California Center for Language Education and research. ERIC Digest, ED278260

[7] Lapkin, Sharon, Merrill Swain, and Stanley M.Shapson. (1990). “French Immersion Agenda for the 90s.” Canadian Modern Language Review, 46:638-674

[8] Bruck, Margaret, Wallace E. Lambert & Richard Tucker (1974) Bilingual Schooling through the Elementary Grades: the St. Lambert Project at Grade Seven. Language Learning, 24(2):183-204.

[9] Landry, R.G. (1974). “A comparison of second language learners and monolinguals on divergent thinking tasks at the elementary school level.” Modern Language Journal, 58: 10-15

[10] Armstrong, P.W. and J.D. Rogers. (1997). Basic Skills Revisited: “The Effects of Foreign Language Instruction on Reading, Math and Language Arts”, Learning Languages, Spring, 20-31.