Cita APA (7a ed.)
ebrary, Inc, & Economist Books. (2005). Style guide ([9th ed.].). Profile Books.
Cita Chicago Style (17a ed.)
ebrary, Inc, y Economist Books. Style Guide. [9th ed.]. London: Profile Books, 2005.
Cita MLA (9a ed.)
ebrary, Inc, y Economist Books. Style Guide. [9th ed.]. Profile Books, 2005.
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