APA-čujuhus (7. p.)
Beardshaw, J., & Brewster, D. (1992). Economics: A student's guide (4th ed.). Pearson education.
Chicago-čujuhus (17. p.)
Beardshaw, John, juo David Brewster. Economics: A Student's Guide. 4th ed. Harlow: Pearson education, 1992.
MLA-čujuhus (9. p.)
Beardshaw, John, juo David Brewster. Economics: A Student's Guide. 4th ed. Pearson education, 1992.
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