APA
National Research Council, . (1968). State of the art: Rigid pavement design research on skid resistance pavement condition evalution. Washington: Highway research board.
Chicago
National Research Council, . 1968. State of the art: Rigid pavement design research on skid resistance pavement condition evalution. Washington: Highway research board.
Harvard
National Research Council, . (1968). State of the art: Rigid pavement design research on skid resistance pavement condition evalution. Washington: Highway research board.
MLA
National Research Council, . State of the art: Rigid pavement design research on skid resistance pavement condition evalution. Washington: Highway research board. 1968.