1. ACTFL. (2010 May 22).Use of the target language in the classroom. Retrieved October 10 2018 fromhttps://www.actfl.org/news/position-statements/use-the-target-language-the-classroom
2. ACTFL. (2012).Proficiency guidelines. Alexandria VA: Author. Retrieved December 14 2018 fromhttps://www.actfl.org/sites/default/files/pdfs/public/ACTFLProficiencyGuidelines2012_FINAL.pdf
3. Bilingual Education Candidates’ Challenges Meeting the Spanish Language/Bilingual Certification Exam and the Impact on Teacher Shortages in the State of Texas, USA
4. Bauman K.(2017 August 28).School enrollment of the Hispanic population: Two decades of growth. U.S. Census Bureau [Blog post]. Retrieved October 12 2018 fromhttps://www.census.gov/newsroom/blogs/random-samplings/2017/08/school_enrollmentof.html
5. Teaching Spanish Heritage Learners and the Nativeness Issue