APA (7th ed.) Citation

Wolf, M. A. (2010). Problem-based learning for the 21st century classroom. Association for Supervision and Curriculum Development.

Chicago Style (17th ed.) Citation

Wolf, Mary Ann. Problem-based Learning for the 21st Century Classroom. Alexandria, VA: Association for Supervision and Curriculum Development, 2010.

MLA (9th ed.) Citation

Wolf, Mary Ann. Problem-based Learning for the 21st Century Classroom. Association for Supervision and Curriculum Development, 2010.