Cita APA (7th ed.)
Duggal, A. K., & Puri, V. P. (1991). Laboratory manual in highway engineering. New Age International.
Cita Chicago (17th ed.)
Duggal, Ajay K., i Vijay P. Puri. Laboratory Manual in Highway Engineering. Kolkata: New Age International, 1991.
Cita MLA (9th ed.)
Duggal, Ajay K., i Vijay P. Puri. Laboratory Manual in Highway Engineering. New Age International, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.