APA (7th ed.) Citation

Torrans, P. H., & Ivey, D. L. (1969). The void spacing indicator. Texas Transportation Institute, Texas A&M University.

Chicago Style (17th ed.) Citation

Torrans, Patrick H., and Don L. Ivey. The Void Spacing Indicator. College Station: Texas Transportation Institute, Texas A&M University, 1969.

MLA (9th ed.) Citation

Torrans, Patrick H., and Don L. Ivey. The Void Spacing Indicator. Texas Transportation Institute, Texas A&M University, 1969.