APA (7e ed.) Bronvermelding

Harlan, J. D. (1992). Science experiences for the early childhood years (5th ed.). Macmillan.

Chicago (17e ed.) Bronvermelding

Harlan, Jean Durgin. Science Experiences for the Early Childhood Years. 5th ed. New York: Macmillan, 1992.

MLA (9e ed.) Bronvermelding

Harlan, Jean Durgin. Science Experiences for the Early Childhood Years. 5th ed. Macmillan, 1992.