Lipsey, R. G. (1995). An Introduction to positive economics (8th ed.). Univ. Pr.
Chicago-čujuhus (17. p.)Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. Oxford: Univ. Pr, 1995.
MLA-čujuhus (9. p.)Lipsey, Richard G. An Introduction to Positive Economics. 8th ed. Univ. Pr, 1995.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.