Network Technical Architecture Group. (1978). Message delivery system for national library and information service network: General requirements. Library of Congress.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Network Technical Architecture Group. Message Delivery System for National Library and Information Service Network: General Requirements. Washington: Library of Congress, 1978.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Network Technical Architecture Group. Message Delivery System for National Library and Information Service Network: General Requirements. Library of Congress, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.