Sierra, J., & Sweet, M. (2009). The sleepy little alphabet: A bedtime story from Alphabet Town. Alfred A. Knopf.
Lua i Stíl Chicago (17ú heag.)Sierra, Judy, agus Melissa Sweet. The Sleepy Little Alphabet: A Bedtime Story from Alphabet Town. New York: Alfred A. Knopf, 2009.
Lua MLA (8ú heag.)Sierra, Judy, agus Melissa Sweet. The Sleepy Little Alphabet: A Bedtime Story from Alphabet Town. Alfred A. Knopf, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.