APA استشهاد

Duggal, A. K., & Puri, P. V. (1991). Laboratory Manual in Highway Engineering. Wiley Eastern.

استشهاد بنمط شيكاغو

Duggal, Ajay K., و P. Vijay Puri. Laboratory Manual in Highway Engineering. New Delhi: Wiley Eastern, 1991.

MLA استشهاد

Duggal, Ajay K., و P. Vijay Puri. Laboratory Manual in Highway Engineering. Wiley Eastern, 1991.