Liverpool. College of Commerce. School of Librarianship & Houghton, B. (1968). Computer based information retrieval systems. Bingley.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Liverpool. College of Commerce. School of Librarianship و B. Houghton. Computer Based Information Retrieval Systems. London: Bingley, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Liverpool. College of Commerce. School of Librarianship و B. Houghton. Computer Based Information Retrieval Systems. Bingley, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.