Lipsey, R. (1999). Principles of economics. O U P.
Chicago-čujuhus (17. p.)Lipsey, Richard. Principles of Economics. Oxford: O U P, 1999.
MLA-čujuhus (9. p.)Lipsey, Richard. Principles of Economics. O U P, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.