Horton, Sarah
Yale University Press, 2000
Buku Teks
Sharma, R.C.
Tata McGraw-Hill, 2002
Buku Teks
Barnet, Sylvan
Little, Brown, 1980
Buku Teks
Bailey, Edward P.
Charles E. Merrill, 1984
Buku Teks
Gershon J. Shugar ... [and others]
Glencoe Press, 1977
Buku Teks