APA
Guell R. C., . (2008). Issues in economics today. Boston: McGraw-Hill Irwin.
Chicago
Guell Robert C, . 2008. Issues in economics today. Boston: McGraw-Hill Irwin.
Harvard
Guell R. C., . (2008). Issues in economics today. Boston: McGraw-Hill Irwin.
MLA
Guell Robert C, . Issues in economics today. Boston: McGraw-Hill Irwin. 2008.