Não informado. (1966). Summary of progress. National Cooperative Highway Research Program.
Cita Chicago Style (17a ed.)Não informado. Summary of Progress. Washington: National Cooperative Highway Research Program, 1966.
Cita MLA (8a ed.)Não informado. Summary of Progress. National Cooperative Highway Research Program, 1966.
Precaución: Estas citas no son 100% exactas.