APA (7th ed.) Citation

Petty, B. H. (1941). Highways then and now: Milestones in the development of modern roads. Purdue University.

Chicago Style (17th ed.) Citation

Petty, Benjamin Harrison. Highways Then and Now: Milestones in the Development of Modern Roads. Lafayette, Ind.: Purdue University, 1941.

MLA (9th ed.) Citation

Petty, Benjamin Harrison. Highways Then and Now: Milestones in the Development of Modern Roads. Purdue University, 1941.

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