Association of Research Libraries. Systems and Procedures Exchange Center, Brennan, P., Reed-Scott, J., & Welch, C. B. (1993). Cooperative strategies in foreign acquisitions: A SPEC kit. Association of Research Libraries, Office of Management Services.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Association of Research Libraries. Systems and Procedures Exchange Center, Patricia Brennan, Jutta Reed-Scott, و C. Brigid Welch. Cooperative Strategies in Foreign Acquisitions: A SPEC Kit. Washington, DC: Association of Research Libraries, Office of Management Services, 1993.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Association of Research Libraries. Systems and Procedures Exchange Center, et al. Cooperative Strategies in Foreign Acquisitions: A SPEC Kit. Association of Research Libraries, Office of Management Services, 1993.