APA-čujuhus (7. p.)

Porter, M. E. (2008). On competition. Harvard Business School Press.

Chicago-čujuhus (17. p.)

Porter, Michael E. On Competition. Boston: Harvard Business School Press, 2008.

MLA-čujuhus (9. p.)

Porter, Michael E. On Competition. Harvard Business School Press, 2008.

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.