Youngman, Michael B.
McGraw-Hill , 1979
Buku Teks SO
Vockell, Edward L.
Macmillan, 1983
Buku Teks
Fox, John
John Wiley & Sons, 1984
Buku Teks SO
Hammersley, Martyn
Paul Chapman Publishing, 2002
Buku Teks
Mouly, George J.
American Book, 1963
Buku Teks