APA (7e ed.) Bronvermelding

Johnston, J., & Gray, A. (1999). Enriching early scientific learning. Open University Press.

Chicago (17e ed.) Bronvermelding

Johnston, Jane, en Adelaide Gray. Enriching Early Scientific Learning. Buckingham [Eng.]: Open University Press, 1999.

MLA (9e ed.) Bronvermelding

Johnston, Jane, en Adelaide Gray. Enriching Early Scientific Learning. Open University Press, 1999.