University of Chicago. Graduate Library School, Asheim, L., Berelson, B. R., Esterquest, R. T., & Greenawey, E. (1964). Persistent issues in American librarianship: Papers presented before the twenty-fifth annual conference of thegraduate library school of the university of Chicago August 15-17, 1960. University of Chicago, Graduate Library School.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of Chicago. Graduate Library School, Lester Asheim, Bernard R. Berelson, Ralph T. Esterquest, و Emerson Greenawey. Persistent Issues in American Librarianship: Papers Presented Before the Twenty-fifth Annual Conference of Thegraduate Library School of the University of Chicago August 15-17, 1960. Chicago: University of Chicago, Graduate Library School, 1964.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)University of Chicago. Graduate Library School, et al. Persistent Issues in American Librarianship: Papers Presented Before the Twenty-fifth Annual Conference of Thegraduate Library School of the University of Chicago August 15-17, 1960. University of Chicago, Graduate Library School, 1964.