Fisher, Louis, author
McGraw-Hill, 1988
Buku Teks
Swisher, Carl Brent, author
Houghton Miffiln, 1943
Buku Teks
Wright, Benjamin F., author
Phoenik Books, 1967
Buku Teks
Fairman, Charles, author
Henry Holt and Company, 1948
Buku Teks
Dowling, Noel T., author
Foundation Press, 1954
Buku Teks