National Research Council (U.S.). Committee on National Statistics, National Research Council (U.S.). Division of Behavioral and Social Sciences and Education, ebrary, Inc, Citro, C. F., Martin, M. E., & Straf, M. L. (2009). Principles and practices for a federal statistical agency (4th ed.). National Academies Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Research Council (U.S.). Committee on National Statistics, National Research Council (U.S.). Division of Behavioral and Social Sciences and Education, Inc ebrary, Constance F. Citro, Margaret E. Martin, και Miron L. Straf. Principles and Practices for a Federal Statistical Agency. 4th ed. Washington, D.C.: National Academies Press, 2009.
Παραπομπή σε μορφή MLA (9th εκδ.)National Research Council (U.S.). Committee on National Statistics, et al. Principles and Practices for a Federal Statistical Agency. 4th ed. National Academies Press, 2009.