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Orloff 2000, p.33. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Brooks, Grimwood et Swenson Jr. 1979, p.231–234. (en) Courtney G. Brooks, James M. Grimwood et Loyd S. Swenson Jr., Chariots for Apollo: A History of Manned Lunar Spacecraft, Washington, D.C., Scientific and Technical Information Branch, NASA, (ISBN978-0-486-46756-6, lire en ligne).
Brooks, Grimwood et Swenson Jr. 1979, p.257–260. (en) Courtney G. Brooks, James M. Grimwood et Loyd S. Swenson Jr., Chariots for Apollo: A History of Manned Lunar Spacecraft, Washington, D.C., Scientific and Technical Information Branch, NASA, (ISBN978-0-486-46756-6, lire en ligne).
Orloff 2000, p.45. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
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Orloff 2000, p.39. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Orloff 2000, p.34. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Orloff 2000, p.35. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Brooks, Grimwood et Swenson Jr. 1979, p.250–252. (en) Courtney G. Brooks, James M. Grimwood et Loyd S. Swenson Jr., Chariots for Apollo: A History of Manned Lunar Spacecraft, Washington, D.C., Scientific and Technical Information Branch, NASA, (ISBN978-0-486-46756-6, lire en ligne).
Brooks, Grimwood et Swenson Jr. 1979, p.276–278. (en) Courtney G. Brooks, James M. Grimwood et Loyd S. Swenson Jr., Chariots for Apollo: A History of Manned Lunar Spacecraft, Washington, D.C., Scientific and Technical Information Branch, NASA, (ISBN978-0-486-46756-6, lire en ligne).
Orloff 2000, p.36. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Orloff 2000, p.37. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
Orloff 2000, p.40. (en) Richard W. Orloff, Apollo by the Numbers: A Statistical Reference, Washington, D.C., NASA History Division, Office of Policy and Plans, (ISBN978-0-16-050631-4, lire en ligne).
hq.nasa.gov
(en) Charles D. Benson et William Barnaby Faherty, Moonport: A History of Apollo Launch Facilities and Operations, NASA, (lire en ligne), chap.20-9 («Apollo 8—A Christmas Gift»).
(en) Andrew Chaikin, «Societal Impact of Spaceflight», dans Steven J. Dick et Roger D. Launius, Live from the Moon: The Societal Impact of Apollo, , 697p. (lire en ligne), p.54
Hacker et Grimwood 1977, p.533. (en) Barton C. Hacker et James M. Grimwood, On the Shoulders of Titans: A History of Project Gemini, Washington, D.C., National Aeronautics and Space Administration, (lire en ligne[PDF]).