Gaya APA

Heiligman, D., Weissman, B. (1996). From Caterpillar to Butterfly: Let's- Read- And- Find- Out- Science, Stage 1 . New York: HarperCollins Publishers.

Gaya MLA

Heiligman, Deborah., Weissman, Bari. "From Caterpillar to Butterfly: Let's- Read- And- Find- Out- Science, Stage 1". New York: HarperCollins Publishers, 1996. Text.