Honnor, Sylvia, author
Arnold-Wheaton, 1986
Buku Teks
Bold, Harold Charles, 1909-, author
Prentice-Hall, 1985
Buku Referensi
Jin Xiong, author
Cambridge University Press, 2008
Buku Teks
Stark, Edward C., author
Glencoe, 1979
Buku Teks
Oldham, Frances K., author
J. B. Lippincott, 1960
Buku Teks