Vernon, R. C. (1997). Professional surveyor's manual. McGraw-Hill.
Chicago Style aipamenaVernon, Robert C. Professional Surveyor's Manual. New York: McGraw-Hill, 1997.
MLA aipamenaVernon, Robert C. Professional Surveyor's Manual. McGraw-Hill, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.