Robertson, Christoper R.
London: Edward Arnold, 1993
Buku Teks
Karandeev, K. B. (Konstantin Borisovich), 1907-1969, author
Peace Publishers, 1966
Buku Teks
Smith, Richard T.
Pergamon Press, 1982
Buku Teks
Harris, Forest K.
Wiley Eastern, 1974
Buku Teks
Liwschitz-Garik, Michael, author
D. Van Nostrand, 1952
Buku Teks