APA (7th ed.) Citation

Hejal, S. S., Oppenlander, J. C., & Buick, T. R. (1968). Optimal selection of flexible pavement components. Purdue University.

Chicago Style (17th ed.) Citation

Hejal, Salim Said, Joseph C. Oppenlander, and Thomas R. Buick. Optimal Selection of Flexible Pavement Components. Lafayette: Purdue University, 1968.

MLA (9th ed.) Citation

Hejal, Salim Said, et al. Optimal Selection of Flexible Pavement Components. Purdue University, 1968.