Vernon, R. C. (1997). Professional surveyor's manual. McGraw-Hill.
Cita Chicago (17th ed.)Vernon, Robert C. Professional Surveyor's Manual. New York: McGraw-Hill, 1997.
Cita MLA (9th ed.)Vernon, Robert C. Professional Surveyor's Manual. McGraw-Hill, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.