Dyfyniad APA
Agor, R. (2017). A textbook of surveying and levelling (12th ed.). Khanna Pub.
Dyfyniad Arddull Chicago
Agor, R. A Textbook of Surveying and Levelling. 12th ed. New Delhi: Khanna Pub, 2017.
Dyfyniad MLA
Agor, R. A Textbook of Surveying and Levelling. 12th ed. Khanna Pub, 2017.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.