Board, N. R. C. T. R. (1991). Geometric design considerations 1991. Washington, D.C : Transportation Research Board, National Research Council.
Chicago-čujuhus (17. p.)Board, National Research Council. Transportation Research. Geometric Design Considerations 1991. Washington, D.C : Transportation Research Board, National Research Council, 1991.
MLA-čujuhus (9. p.)Board, National Research Council. Transportation Research. Geometric Design Considerations 1991. Washington, D.C : Transportation Research Board, National Research Council, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.