Department of the Army Field Manual
Dorset Press, 2000
Buku Teks
Salmon, William A.
[American Management Association, ], 1999
eBooks
Nadelman, Lorraine
Lawrence Erlbaum, 2004
Buku Teks SO
Gaultney, Jane F.
California, 2007
Buku Teks
Gaultney, Jane F.
California, 2007
Buku Teks