Nanney, J. Louis, author
Allyn and Bacon, 1980
Buku Teks
Engelsohn, Harold S.
McGraw-Hill, 1981
Buku Teks
Tobey, John, author
Allyn and Bacon, 1980
Buku Teks
Kay, David A., author
Neb Cliffs Notes, 1994
Buku Teks
Moyer, Robert E., author
McGraw-Hill, 2009
Buku Teks