YPF. (2009). Argentina: Guía YPF-2009.2010 (1a. ed.). YPF.
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Chicago Style (17th ed.) Citation
YPF. Argentina: Guía YPF-2009.2010. 1a. ed. Buenos Aires: YPF, 2009.
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MLA引文
YPF. Argentina: Guía YPF-2009.2010. 1a. ed. YPF, 2009.
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警告：這些引文格式不一定是100％准確.