KREBS, R. D., & WALKER, R. D. (1971). Highway materials. McGraw-Hill.
Chicago-čujuhus (17. p.)KREBS, Robert D., juo Richard D. WALKER. Highway Materials. New York: McGraw-Hill, 1971.
MLA-čujuhus (9. p.)KREBS, Robert D., juo Richard D. WALKER. Highway Materials. McGraw-Hill, 1971.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.