APA (7th ed.) Citation

Samuelson, P. A. (1981). Economics (11th ed.). National Book Store.

Chicago Style (17th ed.) Citation

Samuelson, Paul Anthony. Economics. 11th ed. Manila: National Book Store, 1981.

MLA (9th ed.) Citation

Samuelson, Paul Anthony. Economics. 11th ed. National Book Store, 1981.

Warning: These citations may not always be 100% accurate.