Clayton, G. E. (1997). A guide to everyday economic statistics. McGraw-Hill.
Cita Chicago (17th ed.)Clayton, Gary E. A Guide to Everyday Economic Statistics. Boston, Masstt.: McGraw-Hill, 1997.
Cita MLA (9th ed.)Clayton, Gary E. A Guide to Everyday Economic Statistics. McGraw-Hill, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.