Chang, Semoon, author
Allyn and Bacon, 1990
Buku Teks
Leftwich, Richard H., author
United States of America, 1984
Buku Teks
Mehta, J.K., author
Caitanya Publishing House, 1967
Buku Teks
Meyers, Albert, author
Alumni, 1972
Buku Teks
Wright, David McCord, 1909-, author
Macmillan, 1955
Buku Teks