British Library. National Bibliographic Service. (1993). Shared cataloguing: Report to the principals of the six copyright libraries of the Copyright Libraries Shared Cataloguing Project Steering Group. British Library, National Bibliographic Service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)British Library. National Bibliographic Service. Shared Cataloguing: Report to the Principals of the Six Copyright Libraries of the Copyright Libraries Shared Cataloguing Project Steering Group. Wetherby, England: British Library, National Bibliographic Service, 1993.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)British Library. National Bibliographic Service. Shared Cataloguing: Report to the Principals of the Six Copyright Libraries of the Copyright Libraries Shared Cataloguing Project Steering Group. British Library, National Bibliographic Service, 1993.