PNG, I. (2013). Managerial Economics - 4th Edition. Routledge Taylor & Francis Group.
Chicago-čujuhus (17. p.)PNG, Ivan. Managerial Economics - 4th Edition. London: Routledge Taylor & Francis Group, 2013.
MLA-čujuhus (9. p.)PNG, Ivan. Managerial Economics - 4th Edition. Routledge Taylor & Francis Group, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.