Cassel, C., Sarndal, C. E., & Wretman, J. H. (1977). Foundations of inference in survey sampling: Claes-Magnus Cassel, Carl Erik Sarndal, Jan Hakan Wretman. Wiley.
Chicago-čujuhus (17. p.)Cassel, Claes-Magnus, Carl Erik Sarndal, juo Jan Hakan Wretman. Foundations of Inference in Survey Sampling: Claes-Magnus Cassel, Carl Erik Sarndal, Jan Hakan Wretman. New York: Wiley, 1977.
MLA-čujuhus (9. p.)Cassel, Claes-Magnus, et al. Foundations of Inference in Survey Sampling: Claes-Magnus Cassel, Carl Erik Sarndal, Jan Hakan Wretman. Wiley, 1977.
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