Sagan, Carl, author
Time Incorporated, 1966
Buku Referensi
Reiner, Laurence E.
McGraw-Hill, 1979
Buku Teks
Adler, Irving, author
A Signet Key Book, 1957
Buku Teks
by Andrew M. Barclay ... [and others]
John Wiley & Sons, 1971
Buku Teks
Ernie, Xie, author
China Intercontinental Press, 2008
Buku Teks