APA Style

1). Samuelson, Paul. A, 2). Nordhaus, William. D. (2010). ECONOMICS. 2010 (nineteenth edition). New York: McGraw-Hill,.

Chicago Style

1). Samuelson, Paul. A, 2). Nordhaus, William. D. ECONOMICS. 2010. nineteenth edition New York: McGraw-Hill,, 2010. Printed Book.

MLA Style

1). Samuelson, Paul. A, 2). Nordhaus, William. D. ECONOMICS. 2010. nineteenth edition New York: McGraw-Hill,, 2010. Printed Book.

Turabian Style

1). Samuelson, Paul. A, 2). Nordhaus, William. D. ECONOMICS. 2010. nineteenth edition New York: McGraw-Hill,, 2010. Printed Book.