Science Curriculum Improvement Study, Conard, D., & Lawson, C. A. (1969). Populations (Preliminary ed.). Science Curriculum Improvement Study, Lawrence Hall of Science, University of California.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Science Curriculum Improvement Study, David Conard, و Chester A. Lawson. Populations. Preliminary ed. [Berkeley, Calif.: Science Curriculum Improvement Study, Lawrence Hall of Science, University of California, 1969.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Science Curriculum Improvement Study, et al. Populations. Preliminary ed. Science Curriculum Improvement Study, Lawrence Hall of Science, University of California, 1969.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.