Unwin, L. (1998). The role of the library in distance learning: A study of postgraduate students, course providers and librarians in the UK. Bowker-Saur.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Unwin, Lorna. The Role of the Library in Distance Learning: A Study of Postgraduate Students, Course Providers and Librarians in the UK. East Grindsteas: Bowker-Saur, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Unwin, Lorna. The Role of the Library in Distance Learning: A Study of Postgraduate Students, Course Providers and Librarians in the UK. Bowker-Saur, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.