Rogers, Wayne, 1933- , author
[American Management Association, ], 2011
eBooks
Trump, Donald J.
Random House, 1988
Buku Teks
Kriplen, Nancy, author
American Management Association, 2008
eBooks
Gilbert, Dorothy B., author
R.R.Bowker, [date of publication not identified]
Buku Teks
editor Joseph G. E.Hopkins
Charles Scribner's Sons, 1964
Buku Referensi