Hay, W. W. (1961). An Introduction to tansportation engineering. John Wiley.
Chicago-čujuhus (17. p.)Hay, William W. An Introduction to Tansportation Engineering. NewYork: John Wiley, 1961.
MLA-čujuhus (9. p.)Hay, William W. An Introduction to Tansportation Engineering. John Wiley, 1961.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.