APA

National Research Council, . (1967). Contributions to the 46. annual meeting of the Highway Research Board. Princeton, NJ: Princeton University, Department of Civil Engineering.

Chicago

National Research Council, . 1967. Contributions to the 46. annual meeting of the Highway Research Board. Princeton, NJ: Princeton University, Department of Civil Engineering.

Harvard

National Research Council, . (1967). Contributions to the 46. annual meeting of the Highway Research Board. Princeton, NJ: Princeton University, Department of Civil Engineering.

MLA

National Research Council, . Contributions to the 46. annual meeting of the Highway Research Board. Princeton, NJ: Princeton University, Department of Civil Engineering. 1967.