Cita APA (7th ed.)
Agor, R. A Text Book of Surveying and Levelling. Khanna Publications.
Cita Chicago (17th ed.)
Agor, R. A Text Book of Surveying and Levelling. New Delhi: Khanna Publications.
Cita MLA (9th ed.)
Agor, R. A Text Book of Surveying and Levelling. Khanna Publications.
Atenció: Aquestes cites poden no estar 100% correctes.