-. Space handbook: Astronautics and its application. Government Printing Office.
Chicago-viite (17. p.)-. Space Handbook: Astronautics and Its Application. Government Printing Office.
MLA-viite (8. p.)-. Space Handbook: Astronautics and Its Application. Government Printing Office.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.