Symposium on Computer Bookcharging, Leeds, Eng, & Leeds Polytechnic. Dept. of Librarianship. (1970). Proceedings of a Symposium on Computer Bookcharging: Held at Leeds Polytechnic on 11th May, 1970. Leeds Polytechnic (Department of Librarianship).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on Computer Bookcharging, Leeds, Eng, و Leeds Polytechnic. Dept. of Librarianship. Proceedings of a Symposium on Computer Bookcharging: Held at Leeds Polytechnic on 11th May, 1970. Leeds: Leeds Polytechnic (Department of Librarianship), 1970.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Symposium on Computer Bookcharging, Leeds, Eng, و Leeds Polytechnic. Dept. of Librarianship. Proceedings of a Symposium on Computer Bookcharging: Held at Leeds Polytechnic on 11th May, 1970. Leeds Polytechnic (Department of Librarianship), 1970.