Darlene Freeman. (2005). Butterflies! (Know It All). Learning Horizons.
Lua i Stíl Chicago (17ú heag.)Darlene Freeman. Butterflies! (Know It All). Learning Horizons, 2005.
Lua MLA (9ú heag.)Darlene Freeman. Butterflies! (Know It All). Learning Horizons, 2005.
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