Leftwich, R. H. (1984). Economics of social issues (6th ed.). Business Publications, Inc..
Chicago Style (17. basım) AtıfLeftwich, Richard H. Economics of Social Issues. 6th ed. Austin, Texas: Business Publications, Inc., 1984.
MLA (9th ed.) AtıfLeftwich, Richard H. Economics of Social Issues. 6th ed. Business Publications, Inc., 1984.
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