Ahmad Bunyan Wahib
Questioning liberal islam in Indonesia: Response and critique to jaringan islam liberal
UIN Sunan Kalijaga, 2006
 Artikel Jurnal
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
Shakespeare, William, 1564-1616
Twelfth night or, what you will
Macmillan, 1950
 Buku Teks SO
Smucker, Bob
The Nonprofit lobbying guide : advocating your cause--and getting results / Bob Smucker
Jossey - Bass Publishers, 1991
 Buku Teks SO