APA (7th ed.) Citation

Ledbetter, W. B. (1969). A recommended synthetic coarse aggregate classification system: (revised August, 1969) (Rev.). Texas Transportation Institute, Texas A & M University.

Chicago Style (17th ed.) Citation

Ledbetter, William Burl. A Recommended Synthetic Coarse Aggregate Classification System: (revised August, 1969). Rev. College Station: Texas Transportation Institute, Texas A & M University, 1969.

MLA (9th ed.) Citation

Ledbetter, William Burl. A Recommended Synthetic Coarse Aggregate Classification System: (revised August, 1969). Rev. Texas Transportation Institute, Texas A & M University, 1969.