The ACS style guide: a manual for authors and editors / editor, Janet S. Dodd
American Chemical Society, 1986
 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
The ACS style guide: a manual for authors and editors / editor, Janed S. Dodd
American chemical Society , 1986
 Buku Referensi
Iacone, Salvatore J.
Write to the point: how to communicate in businesswith style and purpose
Carrer Press, 2003
 Buku Teks SO
Johson, Jean
The Bedford guide to the research process / Jean Johnson
Bedford Books, 1987
 Buku Teks SO