Mamlouk, Michael S.
Pearson Prentice Hall, 2006
Buku Teks SO
Krebs, Robert D.
McGraw-Hill, 1971
Buku Teks SO
Macmillan Education, 1988
Buku Teks SO
Hosford, William F.
Cambridge university press, 2008
Buku Teks SO
Sherry, Norman
Thames & Hudson, 1988
Buku Teks SO