Ward D J. (2008). Cool Science Exploring Mars. Lerner.
Lua i Stíl Chicago (17ú heag.)Ward D J. Cool Science Exploring Mars. Lerner, 2008.
Lua MLA (9ú heag.)Ward D J. Cool Science Exploring Mars. Lerner, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.