APA (7th ed.) Zitazioa
Webb, C. H. (2013). What things are made of. University of Pittsburgh Press.
Chicago Style (17th ed.) Zitazioa
Webb, Charles Harper. What Things Are Made of. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2013.
MLA (9th ed.) Zitazioa
Webb, Charles Harper. What Things Are Made of. University of Pittsburgh Press, 2013.
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