Brause, Rita S.
Writing your doctoral dissertation: invisible rules for success
RoutledgeFalmer , 2000
Buku Teks SO
Hunt, William James
The C Toolbox
Addison-Wesley, 1985
Buku Teks SO
Tague, Nancy R.
The quality toolbox
ASQ Quality Press, 2005
Buku Teks
Wise, David
The invisible government
Random House, 1964
Buku Teks
Wells, H.G.
The invisible man
Gramedia Pusaka Utama, 2019
Buku Teks SO