Latham, S. (1991). Library services for off-campus and distance education: An annotated bibliography. Canadian Library Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Latham, Sheila. Library Services for Off-campus and Distance Education: An Annotated Bibliography. Ottawa, Ontario: Canadian Library Association, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Latham, Sheila. Library Services for Off-campus and Distance Education: An Annotated Bibliography. Canadian Library Association, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.