Citazione Stile APA (7a Edizione)
National Research Council (U.S.), ebrary, Inc, & Koenig, J. A. (2011). Assessing 21st century skills: Summary of a workshop. National Academies Press.
Citazione stile Chigago Style (17a edizione)
National Research Council (U.S.), Inc ebrary, e Judith Anderson Koenig. Assessing 21st Century Skills: Summary of a Workshop. Washington, D.C.: National Academies Press, 2011.
Citatione MLA (9a ed.)
National Research Council (U.S.), et al. Assessing 21st Century Skills: Summary of a Workshop. National Academies Press, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.