Terrill, Ross, author
Touchstone Bk, 1993, @1980
Buku Teks
Terrill, Ross
William Morrow and Company , 1984
Buku Teks
Craven, Paul R., author
Dickenson Publishing, 1968
Buku Teks
Liu, Kedi, author
Wenyi Chubanshe, 2001
Buku Teks
Peeters, Benoît, 1956-, author
Polity Press, 2013
Buku Teks