APA

Wong P., Barriga J. & Carder D. (1975). Methods for estimating traffic volumes and composition on national forest roads. : Transportation Research Board. Special report nr 160.

Chicago

Wong P, Barriga J and Carder DR. 1975. Methods for estimating traffic volumes and composition on national forest roads. : Transportation Research Board. Special report nr 160.

Harvard

Wong P., Barriga J. and Carder D. (1975). Methods for estimating traffic volumes and composition on national forest roads. : Transportation Research Board. Special report nr 160.

MLA

Wong P, Barriga J and Carder DR. Methods for estimating traffic volumes and composition on national forest roads. : Transportation Research Board. Special report nr 160. 1975.