Gaya APA

Jordan, H, J., Krupinski, L. (1992). How a Seed Grows: Let's- Read- And- Find- Out- Science, Stage 1 . New York: HarperCollins Publishers.

Gaya MLA

Jordan, Helene, J.., Krupinski, Loretta. "How a Seed Grows: Let's- Read- And- Find- Out- Science, Stage 1". New York: HarperCollins Publishers, 1992. Text.