Martin, A. J., Liem, G. A. D., & Malmberg, L. Multilevel motivation and engagement: Assessing construct validity across students and schools.

Martin, Andrew J., Gregory Arief D. Liem, و Lars-Erik Malmberg. Multilevel Motivation and Engagement: Assessing Construct Validity Across Students and Schools.

Martin, Andrew J., Gregory Arief D. Liem, و Lars-Erik Malmberg. Multilevel Motivation and Engagement: Assessing Construct Validity Across Students and Schools.