Case, K. E. (1989). Principles of microeconomics. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Case, Karl E. Principles of Microeconomics. Prentice Hall, 1989.
Lua MLA (9ú heag.)Case, Karl E. Principles of Microeconomics. Prentice Hall, 1989.
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