PAL, S. K. (1982). Statistical techniques: A basic approach to geography. McGraw-Hill.
Cita Chicago (17th ed.)PAL, Saroj K. Statistical Techniques: A Basic Approach to Geography. New Delhi: McGraw-Hill, 1982.
Cita MLA (9th ed.)PAL, Saroj K. Statistical Techniques: A Basic Approach to Geography. McGraw-Hill, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.