APA (7th ed.) Citation

Samuelson, P. A. (1948). Economics: An introductory analysis. McGraw-Hill Book.

Chicago Style (17th ed.) Citation

Samuelson, Paul A. Economics: An Introductory Analysis. New York [etc.]: McGraw-Hill Book, 1948.

MLA (9th ed.) Citation

Samuelson, Paul A. Economics: An Introductory Analysis. McGraw-Hill Book, 1948.