APA (7th ed.) Citation

Krebs, R. D., & Walker, R. D. (1971). Highway materials / by R.D. Krebs and R.D. Walker. McGraw-Hill.

Chicago Style (17th ed.) Citation

Krebs, R. D., and R. D. Walker. Highway Materials / by R.D. Krebs and R.D. Walker. McGraw-Hill, 1971.

MLA (9th ed.) Citation

Krebs, R. D., and R. D. Walker. Highway Materials / by R.D. Krebs and R.D. Walker. McGraw-Hill, 1971.

Warning: These citations may not always be 100% accurate.