Vernon, R. C. (1997). Professional surveyor's manual. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Vernon, Robert C. Professional Surveyor's Manual. New York: McGraw-Hill, 1997.
Lua MLA (9ú heag.)Vernon, Robert C. Professional Surveyor's Manual. McGraw-Hill, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.