Gaya APA

Petrie,G, ., Kennie,T.J.M, . (1990). Terrain Modelling In Surveying And Civil Engineering . New Delhi: Whittles Publishing.

Gaya MLA

Petrie,G, ., Kennie,T.J.M, . "Terrain Modelling In Surveying And Civil Engineering". New Delhi: Whittles Publishing, 1990. Text.