Halm, George N.
Feffer and Simons, 1971
Buku Teks SO
edited by Masahiko Aoki, Hyung-Ki Kim and Masahiro Okuno-Fujiwara
Clarendon Press , 1996
Buku Teks
Gregory, Paul R.
Houghton Mifflin , 1992
Buku Teks SO
Loucks, William N.
Harper and Row, 1965
Buku Teks SO
Blodgett, Ralp H.
Macmillan, 1949
Buku Teks SO