APA-čujuhus (7. p.)

Leftwich, R. H. (1980). Economics of social issues. Business Pub..

Chicago-čujuhus (17. p.)

Leftwich, Richard H. Economics of Social Issues. Dallas: Business Pub., 1980.

MLA-čujuhus (9. p.)

Leftwich, Richard H. Economics of Social Issues. Business Pub., 1980.

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