Campbell, H. C. (1972). Data clearing house for the social sciences in Canada: A feasibiblity study : prepared by H. C. Campbell ... for the Association of Universities and Colleges of Canada and the Social Sciences Research Council of Canada. Association of Universities and Colleges of Canada: Social Science Research Council of Canada.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Campbell, H. C. Data Clearing House for the Social Sciences in Canada: A Feasibiblity Study : Prepared by H. C. Campbell ... for the Association of Universities and Colleges of Canada and the Social Sciences Research Council of Canada. Ottawa: Association of Universities and Colleges of Canada: Social Science Research Council of Canada, 1972.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Campbell, H. C. Data Clearing House for the Social Sciences in Canada: A Feasibiblity Study : Prepared by H. C. Campbell ... for the Association of Universities and Colleges of Canada and the Social Sciences Research Council of Canada. Association of Universities and Colleges of Canada: Social Science Research Council of Canada, 1972.