Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.