Contribution to collective works (Parts of books)The C-test, the TCF and the CEFR: a validation study.
Reichert, Monique; Keller, Ulrich; Martin, Romain
2010 • In Grotjahn, Rüdiger (Ed.) Der C-Test: Beiträge aus der aktuellen Forschung. The C-Test: Contributions from Current Research