Ball, Alan R., author
Macmillan, 1974
Buku Teks
Ebenstein, William, author
Thomson Learning, 2000
Buku Teks
Sargent, Lyman Tower, author
Brooks/Cole , 1990
Buku Teks
The University of Michigan Press, 1999
Buku Teks
The University Of Michigan Press, 1999
Buku Teks