Caidin, Martin
Rendezvous in space : the history of projects mercury, gemini, dyna-soar and apollo / Martin Caidin
E.P. Dutton & Co., 1962
 Buku Teks
Macmillan encyclopedia of sciences : The Heavens
New York : MacMillan Library Reference USA, 1997,
 Buku Referensi
Thody, Philip
An historical introduction to the European Union
Routledge , 1997
 Buku Teks
Graham, Loren R.
Science in Russia and the Soviet Union: a short history
Cambridge University Press, 1993
 Buku Teks
Riasanovsky, Nicholas V.
A history of Russia
Oxford University Press, 1963
 Buku Teks