Lua APA (7ú heag.)

Boyes,William, & Melvin, M. (2003). Principles of economics (NA.). Cengage Learning.

Lua i Stíl Chicago (17ú heag.)

Boyes,William, agus Michael Melvin. Principles of Economics. NA. Australia: Cengage Learning, 2003.

Lua MLA (9ú heag.)

Boyes,William, agus Michael Melvin. Principles of Economics. NA. Cengage Learning, 2003.

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