Axelrod, Rise B.
The St. Martin's guide to writing
St. Martin's Press, 1997
 Buku Referensi
Axelrod, Rise B.
The St Martins guide to writing
St. Martin Press, 1997
 Buku Referensi
Netzley, Michael
Guide to report writing
Prentice-Hall, 2001
 Buku Teks SO
Beer, David
A guide to writing as an engineer
John Wiley & Sons, 2005
 Buku Teks SO
Guide to reading & writing Japanese
Charles E. Tutle Co.Inc, 1959,
 Buku Referensi