Citazione APA

Samuelson, P. A., & Samuelson, W. (1980). Economics (11th ed.). Mc Graw HIll Kogakusha.

Stile di citazione Chicago

Samuelson, Paul A., e William Samuelson. Economics. 11th ed. Tokyo: Mc Graw HIll Kogakusha, 1980.

Citazione MLA

Samuelson, Paul A., e William Samuelson. Economics. 11th ed. Mc Graw HIll Kogakusha, 1980.