The ACS style guide: a manual for authors and editors / editor, Janed S. Dodd
American chemical Society , 1986
 Buku Referensi
American medical association : manual of style / Cheryl Iverson ...[et al.]
Williams & Willkins, 1989
 Buku Teks SO
Iacone, Salvatore J.
Write to the point: how to communicate in businesswith style and purpose
Carrer Press, 2003
 Buku Teks SO
Gibaldi, Joseph
MLA style manual and guide to scholarly publishing / Joseph Gibaldi
The Modern Language Association of America, 1998
 Buku Teks SO
Cutts, Martin
The plain english guide : guide to write clearly and communicate better
Oxford University Press, 1995
 Buku Teks SO