Arthur, J. Time and Its Measurement.
Chicago-čujuhus (17. p.)Arthur, James. Time and Its Measurement.
MLA-čujuhus (9. p.)Arthur, James. Time and Its Measurement.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
APA-čujuhus (7. p.)