Gaya APA

Ahuja, T, D., Birdi, G. (1982). Roads, Railways bridges and Tunsued engineering (7th ed.). New Delhi: Rajiader Kumar Jain Studard Book house.

Gaya MLA

Ahuja, T., D.., Birdi, G.S.. "Roads, Railways bridges and Tunsued engineering". 7th ed. New Delhi: Rajiader Kumar Jain Studard Book house, 1982. Text.