Lipsey, R. G. (1975). An introduction to positive economics. ELBS, Weidenfeld and Nicolson.
Chicago-čujuhus (17. p.)Lipsey, Richard G. An Introduction to Positive Economics. London: ELBS, Weidenfeld and Nicolson, 1975.
MLA-čujuhus (9. p.)Lipsey, Richard G. An Introduction to Positive Economics. ELBS, Weidenfeld and Nicolson, 1975.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.