APA Style

Samuelson, P, A, (, A., Nordhaus, W, D. (c1998). Economics (16th ed.). mau: Irwin/McGraw-Hill.

MLA Style

Samuelson, Paul, A., (Paul, Anthony)., Nordhaus, William, D.. "Economics". 16th ed. mau: Irwin/McGraw-Hill, c1998. Computer File.