Eisenman, Patricia A., author
Leisure Press, 1990
Buku Teks
Kennedy, David, author
Bay Books, 1988
Buku Referensi
Moore, Mary Courtney, author
Mosby Elsevier, 2009
Buku Teks
Battersby, Albert, author
Pitman , 1970
Buku Teks
Ishikawa, Kaoru, author
Asian Productivity Organization, 1991
Buku Teks