Hyde, Simeon
Addison-Wesley Publishing Company, Inc., 1967
Buku Teks
Elsbree, Langdon, author
Health and Comp, 1967
Buku Teks
Cooley, Thomas
Norton & Company, 1979
Buku Teks
Veit, Richard
Prentice-Hall, 1982
Buku Teks
Richard E. Ferdig, Kristine E. Pytash, editors
Information Science Reference, 2014
Buku Referensi