APA (7e ed.) Bronvermelding

Guell, R. C. (2007). Issues in economics today (3rd ed.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Guell, Robert C. Issues in Economics Today. 3rd ed. Boston, MA: McGraw-Hill, 2007.

MLA (9e ed.) Bronvermelding

Guell, Robert C. Issues in Economics Today. 3rd ed. McGraw-Hill, 2007.