%0 Journal Article %T Metacognition: Defining Its Facets and Levels of Functioning in Relation to Self-Regulation and Co-regulation %A Efklides, Anastasia %J European Psychologist %V 13 %N 4 %P 277-287 %@ 1016-9040 %D 2008-01-01 %I Hogrefe & Huber Publishers %~ DeepDyve