Freiberg, H. J. (1999). Perceiving, behaving, becoming: Lessons learned. Association for Supervision and Curriculum Development.
Citazione stile Chigago Style (17a edizione)Freiberg, H. Jerome. Perceiving, Behaving, Becoming: Lessons Learned. Alexandria, Va.: Association for Supervision and Curriculum Development, 1999.
Citatione MLA (8a ed.)Freiberg, H. Jerome. Perceiving, Behaving, Becoming: Lessons Learned. Association for Supervision and Curriculum Development, 1999.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.