APA (7th ed.) Citation

Covault, D. O. (1957). Indiana's highway needs study. Purdue University.

Chicago Style (17th ed.) Citation

Covault, Donald O. Indiana's Highway Needs Study. Lafayette: Purdue University, 1957.

MLA (9th ed.) Citation

Covault, Donald O. Indiana's Highway Needs Study. Purdue University, 1957.

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