1. The ACTFL assessment of performance toward proficiency in languages: AAPPL measure FAQs 2016 http://aappl.actfl.org
2. 2010 DLI's language guidelines http://www.ausa.org/publications/ausanews/specialreports/2010/8/Pages/DLI%E2%80%99slanguageguidelines.aspx
3. 2015b Avant STAMP score interpretation guide http://avantassessment.com/docs/avant-stamp4s-score-interpretation.pdf