Porter, M. E. (2008). Michael E. Porter On Competition. Bloomsbury Publishing Plc.
Chicago-čujuhus (17. p.)Porter, Michael E. Michael E. Porter On Competition. London: Bloomsbury Publishing Plc, 2008.
MLA-čujuhus (9. p.)Porter, Michael E. Michael E. Porter On Competition. Bloomsbury Publishing Plc, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.