APA (7e ed.) Bronvermelding

Não informado. University of Iowa studies in education. University of Iowa, College of Education.

Chicago (17e ed.) Bronvermelding

Não informado. University of Iowa Studies in Education. Iowa City, Iowa: University of Iowa, College of Education.

MLA (8e ed.) Bronvermelding

Não informado. University of Iowa Studies in Education. University of Iowa, College of Education.

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