Hay, Peter
University of Illinois Press, 1966
Buku Teks
Gardner, Richard N.
Dell Publishing, 1965
Buku Teks
Parish, Matthew
Edward Elgar, 2011
Buku Teks
Carayannis, Elias G.
[, Springer], 2012
eBooks
Tanaka, Akihiko
International House of Japan, 2002
Buku Teks