ebrary, Inc, Aldridge, P. D., & Denis, J. H. (2009). Space exploration research. Nova Science Publishers.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, Paul D. Aldridge, agus John H. Denis. Space Exploration Research. New York: Nova Science Publishers, 2009.
Lua MLA (9ú heag.)ebrary, Inc, et al. Space Exploration Research. Nova Science Publishers, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.