Inmon, W.H., author
Prentice-Hall, 1983
Buku Teks
Elsevier Scientific Publishing, 1971
Buku Referensi
Atre, S., author
Wiley, 1980
Buku Teks
Gregory, Robert Henry, author
Wadsworth, 1963
Buku Teks
Vazsonyi, Andrew, author
Richard D. Irwin, 1980
Buku Teks