Yeates, N. T. M.
Pergamon Press, 1975
Buku Teks
Macfadyen, A.
Pitman Publishing Corporation, 1963
Buku Teks
Linden, Eugene, author
A Dutton Book, 1999
Buku Teks
Scott, John Paul, author
University of Chicago Press, 1958
Buku Teks
Flanders, Frank B., author
Delmar Cengage Learning, 2012
Buku Teks