Lipsey, R. G., Steiner, P. O., & Purvis, D. D. (1984). Economics (Seventh edition.). Harper & Row.
Lua i Stíl Chicago (17ú heag.)Lipsey, Richard G., Peter Otto Steiner, agus Douglas D. Purvis. Economics. Seventh edition. New York: Harper & Row, 1984.
Lua MLA (8ú heag.)Lipsey, Richard G., et al. Economics. Seventh edition. Harper & Row, 1984.
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