APA (7th ed.) Citation

Leftwich, R. H. An introduction to economic thinking [by] Richard H. Leftwich.

Chicago Style (17th ed.) Citation

Leftwich, Richard H. An Introduction to Economic Thinking [by] Richard H. Leftwich. New York, Holt, Rinehart and Winston [1969].

MLA (9th ed.) Citation

Leftwich, Richard H. An Introduction to Economic Thinking [by] Richard H. Leftwich.