Mayer, M. (2008). It's Earth Day! HarperFestival.
Lua i Stíl Chicago (17ú heag.)Mayer, Mercer. It's Earth Day! New York: HarperFestival, 2008.
Lua MLA (8ú heag.)Mayer, Mercer. It's Earth Day! HarperFestival, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.