Cita APA (7th ed.)

Samuelson, P. A. (1961). Economics: An introductory analysis (5a. ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Samuelson, Paul Anthony. Economics: An Introductory Analysis. 5a. ed. Nueva York: McGraw-Hill, 1961.

Cita MLA (9th ed.)

Samuelson, Paul Anthony. Economics: An Introductory Analysis. 5a. ed. McGraw-Hill, 1961.