APA (7th ed.) Citation

GUPTA, B., & GUPTA, A. (2003). Roads, railways, bridges, tunnels and harbour-dock engineering.-- Ed.5. Standard Publishers Distributors.

Chicago Style (17th ed.) Citation

GUPTA, B.I, and Amit GUPTA. Roads, Railways, Bridges, Tunnels and Harbour-dock Engineering.-- Ed.5. Delhi: Standard Publishers Distributors, 2003.

MLA (9th ed.) Citation

GUPTA, B.I, and Amit GUPTA. Roads, Railways, Bridges, Tunnels and Harbour-dock Engineering.-- Ed.5. Standard Publishers Distributors, 2003.