Cita APA (7a ed.)

Samuelson, P. A. (1967). Economics: An introductory analysis (7th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Samuelson, Paul A. Economics: An Introductory Analysis. 7th ed. New York: McGraw-Hill, 1967.

Cita MLA (9a ed.)

Samuelson, Paul A. Economics: An Introductory Analysis. 7th ed. McGraw-Hill, 1967.