APA-čujuhus (7. p.)
Leftwich, R. H., & Sharp, A. M. (1974). Economics of social issues. Business Publications.
Chicago-čujuhus (17. p.)
Leftwich, Richard H., juo Ansel Miree Sharp. Economics of Social Issues. Dallas: Business Publications, 1974.
MLA-čujuhus (9. p.)
Leftwich, Richard H., juo Ansel Miree Sharp. Economics of Social Issues. Business Publications, 1974.
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