APA (7e ed.) Bronvermelding
Keen, M., Kim, Y. K., & Varsano, R. (2006). The "flat tax(es)": Principles and evidence. International Monetary Fund, Fiscal Affairs Dept..
Chicago (17e ed.) Bronvermelding
Keen, Michael, Yitae Kevin Kim, en Ricardo Varsano. The "Flat Tax(es)": Principles and Evidence. Washington, D.C.: International Monetary Fund, Fiscal Affairs Dept., 2006.
MLA (9e ed.) Bronvermelding
Keen, Michael, et al. The "Flat Tax(es)": Principles and Evidence. International Monetary Fund, Fiscal Affairs Dept., 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.