Gill, R. T. (1978). Economics: A text with readings. Goodyear.
Chicago-čujuhus (17. p.)Gill, Richard T. Economics: A Text with Readings. Santa Monica.: Goodyear, 1978.
MLA-čujuhus (9. p.)Gill, Richard T. Economics: A Text with Readings. Goodyear, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.