Cherry, Paul
Questions that sell: the powerful process for discovering what your customer really wants
American Management Association, 2006
 eBooks
Johnson, Falk S.
Improving what you write
Houghton Mifflin, 1965
 Buku Teks
Smucker, Bob
The Nonprofit lobbying guide : advocating your cause--and getting results / Bob Smucker
Jossey - Bass Publishers, 1991
 Buku Teks
Considering a Japanese Morality: What the Life of Chikuro Hiroike Represents
 Artikel Jurnal
Stone, M. David
Getting the most from wordstar and mailmerge: things micropro never told you
Prentice-Hall, 1984
 Buku Teks