APA Style

Samuelson, Paul A., Nordhaus, William D.. (2005). Economics (18). New York: McGraw-Hill.

Chicago Style

Samuelson, Paul A., Nordhaus, William D.. Economics. 18 New York: McGraw-Hill, 2005. Text.

MLA Style

Samuelson, Paul A., Nordhaus, William D.. Economics. 18 New York: McGraw-Hill, 2005. Text.

Turabian Style

Samuelson, Paul A., Nordhaus, William D.. Economics. 18 New York: McGraw-Hill, 2005. Print.