Dale Carnegie and Associates, I., & Petkoff, R. (2014). How to win friends & influence people in the digital age (Unabridged.). Recorded Books, Inc..
Style de citation Chicago (17e éd.)Dale Carnegie and Associates, Inc, et Robert Petkoff. How to Win Friends & Influence People in the Digital Age. Unabridged. Prince Frederick: Recorded Books, Inc., 2014.
Style de citation MLA (8e éd.)Dale Carnegie and Associates, Inc, et Robert Petkoff. How to Win Friends & Influence People in the Digital Age. Unabridged. Recorded Books, Inc., 2014.
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