APA (7th ed.) Citation

Helliwell, J. F. (1998). How much do national borders matter? Brookings Institution Press.

Chicago Style (17th ed.) Citation

Helliwell, John F. How Much Do National Borders Matter? Washington, D.C.: Brookings Institution Press, 1998.

MLA (9th ed.) Citation

Helliwell, John F. How Much Do National Borders Matter? Brookings Institution Press, 1998.

Warning: These citations may not always be 100% accurate.