APA (7th ed.) Zitazioa
Punmia, B. (1990). Surveying (9th ed.). Laxmi.
Chicago Style (17th ed.) Zitazioa
Punmia, B.C. Surveying. 9th ed. New delhi: Laxmi, 1990.
MLA (9th ed.) Zitazioa
Punmia, B.C. Surveying. 9th ed. Laxmi, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.