Não informado. (1973). Illinois school research and development. Illinois Association for Supervision and Curriculum Development.
Style de citation Chicago (17e éd.)Não informado. Illinois School Research and Development. Nottingham, Inglaterra: Illinois Association for Supervision and Curriculum Development, 1973.
Style de citation MLA (8e éd.)Não informado. Illinois School Research and Development. Illinois Association for Supervision and Curriculum Development, 1973.
Attention : ces citations peuvent ne pas être correctes à 100%.