Cita APA (7th ed.)

Downs, H. G., & Wallace, D. W. (1982). Shoulder geometrics and use guidelines. Transportation Research Board, National Research Council.

Cita Chicago (17th ed.)

Downs, Hugh G., i David W. Wallace. Shoulder Geometrics and Use Guidelines. Washington, D.C: Transportation Research Board, National Research Council, 1982.

Cita MLA (9th ed.)

Downs, Hugh G., i David W. Wallace. Shoulder Geometrics and Use Guidelines. Transportation Research Board, National Research Council, 1982.