Wavwick, D. (1975). The sample survey: Theory & practice. McGraw Hill.
Chicago-čujuhus (17. p.)Wavwick, D. The Sample Survey: Theory & Practice. NewYork: McGraw Hill, 1975.
MLA-čujuhus (9. p.)Wavwick, D. The Sample Survey: Theory & Practice. McGraw Hill, 1975.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.