Stafford, William, author
McGraw-Hill, 1966
Buku Teks
Montgomery, Robert L., author
Little, Brown, 1962
Buku Teks
Cerf, Bennett A., author
Harper & Row, 1957
Buku Teks
edited by Josephine K. Piercy
Macmillan, 1930
Buku Teks
Wilson, John Dover, compiler
University Press, 1926
Buku Teks