Orloff, Richard W. (September 2004) [Mula diterbitkan 2000]. "Table of Contents". Apollo by the Numbers: A Statistical Reference. NASA History Division, Office of Policy and Plans. NASA History Series. Washington, D.C.: NASA. ISBN0-16-050631-X. LCCN00-061677. NASA SP-2000-4029. Dicapai pada 15 April 2012. Unknown parameter |chapterurl= ignored (bantuan)
nasa.gov
history.nasa.gov
Orloff, Richard W. (September 2004) [Mula diterbitkan 2000]. "Table of Contents". Apollo by the Numbers: A Statistical Reference. NASA History Division, Office of Policy and Plans. NASA History Series. Washington, D.C.: NASA. ISBN0-16-050631-X. LCCN00-061677. NASA SP-2000-4029. Dicapai pada 15 April 2012. Unknown parameter |chapterurl= ignored (bantuan)
wikipedia.org
en.wikipedia.org
Orloff, Richard W. (September 2004) [Mula diterbitkan 2000]. "Table of Contents". Apollo by the Numbers: A Statistical Reference. NASA History Division, Office of Policy and Plans. NASA History Series. Washington, D.C.: NASA. ISBN0-16-050631-X. LCCN00-061677. NASA SP-2000-4029. Dicapai pada 15 April 2012. Unknown parameter |chapterurl= ignored (bantuan)