Farnsworth, E. Allan, author
Oceana Publications,Inc, 1963
Buku Teks
Lewis Mayers, author
Prentice-Hall, 1963
Buku Teks
Berch, Michael A., author
West, 2010
Buku Teks
Dukore, Bernard F. (Bernard Frank), 1931-
Macmillan Education , 1988
Buku Teks
Hamburger, Max
New Haven Yale University Press, 1951
Buku Teks