Polak, P. (1979). Systematic errors in engineering experiments. Gulf Publishing.
Chicago-čujuhus (17. p.)Polak, Peter. Systematic Errors in Engineering Experiments. Houston: Gulf Publishing, 1979.
MLA-čujuhus (9. p.)Polak, Peter. Systematic Errors in Engineering Experiments. Gulf Publishing, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.