APA (7th ed.) Citation

Covault, D. O., & Michael, H. L. (1959). Estimation of highway needs for county primary road systems by sample survey methods. Purdue University.

Chicago Style (17th ed.) Citation

Covault, Donald O., and Harold L. Michael. Estimation of Highway Needs for County Primary Road Systems by Sample Survey Methods. Lafayette: Purdue University, 1959.

MLA (9th ed.) Citation

Covault, Donald O., and Harold L. Michael. Estimation of Highway Needs for County Primary Road Systems by Sample Survey Methods. Purdue University, 1959.