Dyfyniad APA

O'Sullivan, A., Sheffrin, S. M., & Perez, S. J. (2012). Economics: Principles, applications, and tools (7th ed.). Pearson Prentice Hall.

Dyfyniad Arddull Chicago

O'Sullivan, Arthur, Steven M. Sheffrin, and Stephen J. Perez. Economics: Principles, Applications, and Tools. 7th ed. Boston: Pearson Prentice Hall, 2012.

Dyfyniad MLA

O'Sullivan, Arthur, et al. Economics: Principles, Applications, and Tools. 7th ed. Pearson Prentice Hall, 2012.

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