Association of College and Research Libraries, University of Illinois at Urbana-Champaign. Graduate School of Library and Information Science. Center for Informatics Research in Science and Scholarship, Petrowski, M. J., & Varvel, V. E. (2009). 2008 academic library trends and statistics for Carnegie classification... Association of College and Research Libraries.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Association of College and Research Libraries, University of Illinois at Urbana-Champaign. Graduate School of Library and Information Science. Center for Informatics Research in Science and Scholarship, Mary Jane Petrowski, و Virgil E. Varvel. 2008 Academic Library Trends and Statistics for Carnegie Classification... Chicago: Association of College and Research Libraries, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Association of College and Research Libraries, et al. 2008 Academic Library Trends and Statistics for Carnegie Classification... Association of College and Research Libraries, 2009.