Lockhart, William B., author
West , 1967
Buku Teks
Friedrich, Carl J., author
Boston University Press, 1967
Buku Teks
Epps, Garrett, author
Oxford Univesity Press, 2013
Buku Teks
Stannard, Harold, author
Adam and Charles Black, 1949
Buku Teks
Heringa, A.W., author
Metro, 2009
Buku Teks