Tohutoro APA (7th ed.)

LEFTWICH, R. H. (1969). Introduction to economic thinking. Holt.

Tohutoru Kātū Chicago (17th ed.)

LEFTWICH, Richard H. Introduction to Economic Thinking. New York: Holt, 1969.

Tohutoro MLA (9th ed.)

LEFTWICH, Richard H. Introduction to Economic Thinking. Holt, 1969.