Cita APA (7a ed.)
Singh, G., & Singh, J. (1991). Highway engineering (rev. & enlarged ed.). Standard publishers distributors.
Cita Chicago Style (17a ed.)
Singh, Gurcharan, y Jagdish Singh. Highway Engineering. rev. & enlarged ed. Delhi: Standard publishers distributors, 1991.
Cita MLA (9a ed.)
Singh, Gurcharan, y Jagdish Singh. Highway Engineering. rev. & enlarged ed. Standard publishers distributors, 1991.
Precaución: Estas citas no son 100% exactas.