APA (7th ed.) Zitazioa
Agor, R. A Text Book of Surveying and Levelling. Khanna Publications.
Chicago Style (17th ed.) Zitazioa
Agor, R. A Text Book of Surveying and Levelling. New Delhi: Khanna Publications.
MLA (9th ed.) Zitazioa
Agor, R. A Text Book of Surveying and Levelling. Khanna Publications.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.