APA (7e ed.) Bronvermelding

Heyns, B. (1978). Summer learning and the effects of schooling. Academic Press.

Chicago (17e ed.) Bronvermelding

Heyns, Barbara. Summer Learning and the Effects of Schooling. New York: Academic Press, 1978.

MLA (8e ed.) Bronvermelding

Heyns, Barbara. Summer Learning and the Effects of Schooling. Academic Press, 1978.

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