International Federation of Library Associations and Institutions. Task Force on Guidelines for OPAC Displays.Task Force on Guidelines for OPAC Displays & ebrary, Inc. (2010). Richtlinien für die OPAC-Anzeige. De Gruyter.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Federation of Library Associations and Institutions. Task Force on Guidelines for OPAC Displays.Task Force on Guidelines for OPAC Displays و Inc ebrary. Richtlinien Für Die OPAC-Anzeige. Berlin ; New York: De Gruyter, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)International Federation of Library Associations and Institutions. Task Force on Guidelines for OPAC Displays.Task Force on Guidelines for OPAC Displays و Inc ebrary. Richtlinien Für Die OPAC-Anzeige. De Gruyter, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.