Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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