Hirsch, T. J., Ivey, D. L., & Smith, H. L. (1969). TOR-SHOK and ROTO-SHOK energy absorbing protective barriers / by. Texas Transportation Institute, Texas A & M Research Foundation.
Chicago Style (17th ed.) CitationHirsch, T. J., Don L. Ivey, and Harry L. Smith. TOR-SHOK and ROTO-SHOK Energy Absorbing Protective Barriers / by. [College Station, Tex.]: Texas Transportation Institute, Texas A & M Research Foundation, 1969.
MLA (9th ed.) CitationHirsch, T. J., et al. TOR-SHOK and ROTO-SHOK Energy Absorbing Protective Barriers / by. Texas Transportation Institute, Texas A & M Research Foundation, 1969.
Warning: These citations may not always be 100% accurate.