(1997). The state of competition in federal ADP acquisition: Hearing before the Legislation and National Security Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, second session, September 13, 1990.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)The State of Competition in Federal ADP Acquisition: Hearing Before the Legislation and National Security Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, Second Session, September 13, 1990. 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)The State of Competition in Federal ADP Acquisition: Hearing Before the Legislation and National Security Subcommittee of the Committee on Government Operations, House of Representatives, One Hundred First Congress, Second Session, September 13, 1990. 1997.