APA (7th ed.) Citation

Ripple, D. A. (1975). History of the interstate highway system in Indiana. Purdue University.

Chicago Style (17th ed.) Citation

Ripple, David Alan. History of the Interstate Highway System in Indiana. West Lafayette, Ind.: Purdue University, 1975.

MLA (9th ed.) Citation

Ripple, David Alan. History of the Interstate Highway System in Indiana. Purdue University, 1975.