Dyfyniad APA
Singh, G., & Singh, J. (1991). Highway engineering (rev. & enlarged ed.). Standard publishers distributors.
Dyfyniad Arddull Chicago
Singh, Gurcharan, and Jagdish Singh. Highway Engineering. rev. & enlarged ed. Delhi: Standard publishers distributors, 1991.
Dyfyniad MLA
Singh, Gurcharan, and Jagdish Singh. Highway Engineering. rev. & enlarged ed. Standard publishers distributors, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.