Cita APA (7th ed.)
Roy,S.K. (1999). Fundamentals of surveying. New Delhi.
Cita Chicago (17th ed.)
Roy,S.K. Fundamentals of Surveying. New York: New Delhi, 1999.
Cita MLA (9th ed.)
Roy,S.K. Fundamentals of Surveying. New Delhi, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.