APA-čujuhus (7. p.)
Barrett, S. (2007). Why cooperate?: The incentive to supply global public goods. Oxford University Press.
Chicago-čujuhus (17. p.)
Barrett, Scott. Why Cooperate?: The Incentive to Supply Global Public Goods. Oxford ; New York: Oxford University Press, 2007.
MLA-čujuhus (9. p.)
Barrett, Scott. Why Cooperate?: The Incentive to Supply Global Public Goods. Oxford University Press, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.