Cita APA

American Association of State Highway and Transportation Officials, & American Association of State Highway and Transportation Officials. (1989). Guide specifications for structural design of sound barriers, 1989 (1. edition.). Washington, D.C.: AASHTO.

Citación estilo Chicago

American Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Guide Specifications for Structural Design of Sound Barriers, 1989. 1. edition. Washington, D.C.: AASHTO, 1989.

Cita MLA

American Association of State Highway and Transportation Officials, y American Association of State Highway and Transportation Officials. Guide Specifications for Structural Design of Sound Barriers, 1989. 1. edition. Washington, D.C.: AASHTO, 1989.