Dyfyniad APA
Duggal, A. K., & Puri, V. P. (1991). Laboratory manual in highway engineering. New Age International.
Dyfyniad Arddull Chicago
Duggal, Ajay K., and Vijay P. Puri. Laboratory Manual in Highway Engineering. Kolkata: New Age International, 1991.
Dyfyniad MLA
Duggal, Ajay K., and Vijay P. Puri. Laboratory Manual in Highway Engineering. New Age International, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.