Merrill, S., & Grofman, B. (1999). A unified theory of voting: Directional and proximity spatial models. Cambridge University Press.
Chicago-čujuhus (17. p.)Merrill, Samuel, juo Bernard Grofman. A Unified Theory of Voting: Directional and Proximity Spatial Models. Cambridge, UK ; New York: Cambridge University Press, 1999.
MLA-čujuhus (9. p.)Merrill, Samuel, juo Bernard Grofman. A Unified Theory of Voting: Directional and Proximity Spatial Models. Cambridge University Press, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.