Darling, D. (2003). The complete book of spaceflight from apollo 1 to zero gravity. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Darling, David. The Complete Book of Spaceflight from Apollo 1 to Zero Gravity. John Wiley & Sons, 2003.
Lua MLA (8ú heag.)Darling, David. The Complete Book of Spaceflight from Apollo 1 to Zero Gravity. John Wiley & Sons, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.