APA (7e ed.) Bronvermelding

Não informado. (1973). Illinois school research and development. Illinois Association for Supervision and Curriculum Development.

Chicago (17e ed.) Bronvermelding

Não informado. Illinois School Research and Development. Nottingham, Inglaterra: Illinois Association for Supervision and Curriculum Development, 1973.

MLA (8e ed.) Bronvermelding

Não informado. Illinois School Research and Development. Illinois Association for Supervision and Curriculum Development, 1973.

Let op: Deze citaties zijn niet altijd 100% accuraat.