Exhibit 32.02

CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of OneSource Information Services, Inc.
(the "Company") on Form 10-K for the year ended December 31, 2003 as filed with
the United States Securities and Exchange Commission on the date hereof (the
"Report"), I, Roy D. Landon, Chief Financial Officer of the Company, certify,
pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d)
of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material
respects, the financial condition and results of operations of the Company.


Date: March 29, 2004

                                            /s/ Roy D. Landon
                                        ----------------------------------------
                                            Roy D. Landon
                                            Chief Financial Officer