Chandrasekhar, S., author
Frederick A. Praeger, 1965
Buku Teks
Poats, Rutherford M.
Brookings Institution , 1972
Buku Teks
Kaplan, Jacob J., author
N.Y. Frederick A. Praeger , 1968
Buku Teks
Lancaster, Carol, author
Brooking Institution Press, 2005
Buku Teks
edited by W. Lee Baldwin and W. David Maxwell
Lexington Books, 1975
Buku Teks